./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c --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_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/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_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/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_821b1d1a-eadc-40a4-b047-78982a5ca5e6/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 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 --- 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 11:00:39,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:00:39,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:00:39,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:00:39,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:00:39,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:00:39,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:00:39,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:00:39,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:00:39,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:00:39,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:00:39,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:00:39,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:00:39,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:00:39,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:00:39,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:00:39,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:00:39,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:00:39,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:00:39,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:00:39,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:00:39,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:00:39,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:00:39,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:00:39,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:00:39,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:00:39,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:00:39,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:00:39,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:00:39,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:00:39,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:00:39,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:00:39,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:00:39,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:00:39,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:00:39,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:00:39,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:00:39,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:00:39,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:00:39,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:00:39,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:00:39,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:00:39,150 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:00:39,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:00:39,151 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:00:39,151 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:00:39,152 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:00:39,153 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:00:39,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:00:39,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:00:39,154 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:00:39,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:00:39,155 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:00:39,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:00:39,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:00:39,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:00:39,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:00:39,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:00:39,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:00:39,156 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:00:39,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:00:39,157 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:00:39,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:00:39,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:00:39,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:00:39,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:00:39,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:00:39,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:00:39,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:00:39,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:00:39,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:00:39,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:00:39,159 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:00:39,160 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:00:39,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:00:39,160 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_821b1d1a-eadc-40a4-b047-78982a5ca5e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 [2022-11-20 11:00:39,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:00:39,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:00:39,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:00:39,444 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:00:39,444 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:00:39,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2022-11-20 11:00:42,810 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:00:43,312 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:00:43,312 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2022-11-20 11:00:43,339 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/data/63623aa23/f7709d89b32043ea94a884367821f243/FLAGcdd872a03 [2022-11-20 11:00:43,360 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/data/63623aa23/f7709d89b32043ea94a884367821f243 [2022-11-20 11:00:43,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:00:43,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:00:43,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:00:43,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:00:43,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:00:43,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:00:43" (1/1) ... [2022-11-20 11:00:43,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1c268d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:43, skipping insertion in model container [2022-11-20 11:00:43,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:00:43" (1/1) ... [2022-11-20 11:00:43,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:00:43,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:00:44,181 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_821b1d1a-eadc-40a4-b047-78982a5ca5e6/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2022-11-20 11:00:44,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:00:44,260 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:00:44,556 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_821b1d1a-eadc-40a4-b047-78982a5ca5e6/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2022-11-20 11:00:44,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:00:44,597 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:00:44,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44 WrapperNode [2022-11-20 11:00:44,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:00:44,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:00:44,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:00:44,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:00:44,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,793 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-20 11:00:44,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:00:44,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:00:44,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:00:44,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:00:44,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,914 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:00:44,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:00:44,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:00:44,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:00:44,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (1/1) ... [2022-11-20 11:00:44,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:00:44,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:44,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:00:45,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:00:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:00:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:00:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:00:45,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:00:45,158 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:00:45,167 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:00:47,516 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:00:47,543 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:00:47,543 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:00:47,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:00:47 BoogieIcfgContainer [2022-11-20 11:00:47,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:00:47,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:00:47,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:00:47,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:00:47,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:00:43" (1/3) ... [2022-11-20 11:00:47,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11311ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:00:47, skipping insertion in model container [2022-11-20 11:00:47,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:00:44" (2/3) ... [2022-11-20 11:00:47,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11311ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:00:47, skipping insertion in model container [2022-11-20 11:00:47,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:00:47" (3/3) ... [2022-11-20 11:00:47,571 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label25.c [2022-11-20 11:00:47,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:00:47,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:00:47,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:00:47,706 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;@704e7fc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:00:47,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:00:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-20 11:00:47,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:47,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:47,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:47,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash 724714706, now seen corresponding path program 1 times [2022-11-20 11:00:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:47,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541207334] [2022-11-20 11:00:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:48,995 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 11:00:48,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:48,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541207334] [2022-11-20 11:00:48,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541207334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:48,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:48,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:00:48,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173955674] [2022-11-20 11:00:49,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:49,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:00:49,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:00:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:49,047 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:50,371 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2022-11-20 11:00:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:00:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2022-11-20 11:00:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:50,396 INFO L225 Difference]: With dead ends: 836 [2022-11-20 11:00:50,396 INFO L226 Difference]: Without dead ends: 457 [2022-11-20 11:00:50,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:50,411 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 103 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:50,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 11:00:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-20 11:00:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-11-20 11:00:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2022-11-20 11:00:50,474 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 180 [2022-11-20 11:00:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:50,475 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2022-11-20 11:00:50,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2022-11-20 11:00:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-20 11:00:50,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:50,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:50,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:00:50,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash -586354594, now seen corresponding path program 1 times [2022-11-20 11:00:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:50,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801321451] [2022-11-20 11:00:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:50,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:50,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801321451] [2022-11-20 11:00:50,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801321451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:50,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:50,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:00:50,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518194357] [2022-11-20 11:00:50,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:50,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:00:50,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:50,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:00:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:50,935 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:51,944 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2022-11-20 11:00:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:00:51,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 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 186 [2022-11-20 11:00:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:51,949 INFO L225 Difference]: With dead ends: 1340 [2022-11-20 11:00:51,949 INFO L226 Difference]: Without dead ends: 891 [2022-11-20 11:00:51,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:51,952 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:51,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:00:51,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-20 11:00:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2022-11-20 11:00:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2022-11-20 11:00:51,995 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 186 [2022-11-20 11:00:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:51,996 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2022-11-20 11:00:51,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2022-11-20 11:00:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-20 11:00:52,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:52,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:52,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:00:52,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1559504468, now seen corresponding path program 1 times [2022-11-20 11:00:52,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:52,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603425461] [2022-11-20 11:00:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:52,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:52,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:52,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603425461] [2022-11-20 11:00:52,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603425461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:52,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:52,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:00:52,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812430435] [2022-11-20 11:00:52,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:52,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:00:52,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:00:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:52,404 INFO L87 Difference]: Start difference. First operand 886 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:53,438 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2022-11-20 11:00:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:00:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-20 11:00:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:53,445 INFO L225 Difference]: With dead ends: 2605 [2022-11-20 11:00:53,446 INFO L226 Difference]: Without dead ends: 1721 [2022-11-20 11:00:53,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:53,456 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 232 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:53,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 126 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:00:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-20 11:00:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-11-20 11:00:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5005820721769498) internal successors, (2578), 1718 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2578 transitions. [2022-11-20 11:00:53,519 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2578 transitions. Word has length 190 [2022-11-20 11:00:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:53,523 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2578 transitions. [2022-11-20 11:00:53,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2578 transitions. [2022-11-20 11:00:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-20 11:00:53,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:53,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:53,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:00:53,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1196520631, now seen corresponding path program 1 times [2022-11-20 11:00:53,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:53,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200707472] [2022-11-20 11:00:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:53,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200707472] [2022-11-20 11:00:53,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200707472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:53,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:53,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:00:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510249061] [2022-11-20 11:00:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:53,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:00:53,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:00:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:53,850 INFO L87 Difference]: Start difference. First operand 1719 states and 2578 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:54,813 INFO L93 Difference]: Finished difference Result 5080 states and 7623 transitions. [2022-11-20 11:00:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:00:54,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2022-11-20 11:00:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:54,827 INFO L225 Difference]: With dead ends: 5080 [2022-11-20 11:00:54,827 INFO L226 Difference]: Without dead ends: 3363 [2022-11-20 11:00:54,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:54,833 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 254 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:54,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 179 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:00:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-11-20 11:00:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3361. [2022-11-20 11:00:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 1.4321428571428572) internal successors, (4812), 3360 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4812 transitions. [2022-11-20 11:00:54,917 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4812 transitions. Word has length 193 [2022-11-20 11:00:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:54,918 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 4812 transitions. [2022-11-20 11:00:54,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4812 transitions. [2022-11-20 11:00:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-20 11:00:54,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:54,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:54,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:00:54,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1347155746, now seen corresponding path program 1 times [2022-11-20 11:00:54,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:54,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749200575] [2022-11-20 11:00:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:54,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:55,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749200575] [2022-11-20 11:00:55,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749200575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:55,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:55,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:00:55,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74328660] [2022-11-20 11:00:55,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:55,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:00:55,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:55,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:00:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:55,223 INFO L87 Difference]: Start difference. First operand 3361 states and 4812 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:56,172 INFO L93 Difference]: Finished difference Result 9995 states and 14319 transitions. [2022-11-20 11:00:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:00:56,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-20 11:00:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:56,196 INFO L225 Difference]: With dead ends: 9995 [2022-11-20 11:00:56,196 INFO L226 Difference]: Without dead ends: 6636 [2022-11-20 11:00:56,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:56,205 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 242 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:56,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 173 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:00:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2022-11-20 11:00:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 6630. [2022-11-20 11:00:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6630 states, 6629 states have (on average 1.368381354653794) internal successors, (9071), 6629 states have internal predecessors, (9071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6630 states to 6630 states and 9071 transitions. [2022-11-20 11:00:56,417 INFO L78 Accepts]: Start accepts. Automaton has 6630 states and 9071 transitions. Word has length 194 [2022-11-20 11:00:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:56,418 INFO L495 AbstractCegarLoop]: Abstraction has 6630 states and 9071 transitions. [2022-11-20 11:00:56,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 6630 states and 9071 transitions. [2022-11-20 11:00:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-20 11:00:56,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:56,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:56,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:00:56,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:56,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:56,443 INFO L85 PathProgramCache]: Analyzing trace with hash -130752193, now seen corresponding path program 1 times [2022-11-20 11:00:56,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195163377] [2022-11-20 11:00:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:56,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195163377] [2022-11-20 11:00:56,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195163377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:56,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:56,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:00:57,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127812609] [2022-11-20 11:00:57,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:57,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:00:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:57,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:00:57,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:57,043 INFO L87 Difference]: Start difference. First operand 6630 states and 9071 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:58,168 INFO L93 Difference]: Finished difference Result 17747 states and 24321 transitions. [2022-11-20 11:00:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:00:58,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2022-11-20 11:00:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:58,204 INFO L225 Difference]: With dead ends: 17747 [2022-11-20 11:00:58,204 INFO L226 Difference]: Without dead ends: 11119 [2022-11-20 11:00:58,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:00:58,213 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 208 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:58,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:00:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2022-11-20 11:00:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 11096. [2022-11-20 11:00:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 11095 states have (on average 1.320865254619198) internal successors, (14655), 11095 states have internal predecessors, (14655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 14655 transitions. [2022-11-20 11:00:58,558 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 14655 transitions. Word has length 199 [2022-11-20 11:00:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:58,558 INFO L495 AbstractCegarLoop]: Abstraction has 11096 states and 14655 transitions. [2022-11-20 11:00:58,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 14655 transitions. [2022-11-20 11:00:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-20 11:00:58,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:58,578 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:58,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:00:58,579 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1681277464, now seen corresponding path program 1 times [2022-11-20 11:00:58,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:58,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627441058] [2022-11-20 11:00:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:58,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:59,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:59,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627441058] [2022-11-20 11:00:59,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627441058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:59,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235847836] [2022-11-20 11:00:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:59,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:59,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:59,062 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:59,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:00:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:59,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:00:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:00:59,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:00:59,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235847836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:59,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:00:59,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 11:00:59,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095271370] [2022-11-20 11:00:59,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:59,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:00:59,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:59,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:00:59,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:00:59,365 INFO L87 Difference]: Start difference. First operand 11096 states and 14655 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:00,625 INFO L93 Difference]: Finished difference Result 29906 states and 39731 transitions. [2022-11-20 11:01:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:00,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 204 [2022-11-20 11:01:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:00,682 INFO L225 Difference]: With dead ends: 29906 [2022-11-20 11:01:00,682 INFO L226 Difference]: Without dead ends: 19015 [2022-11-20 11:01:00,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:00,694 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 230 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:00,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 413 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:01:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19015 states. [2022-11-20 11:01:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19015 to 19011. [2022-11-20 11:01:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19011 states, 19010 states have (on average 1.2027880063124672) internal successors, (22865), 19010 states have internal predecessors, (22865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19011 states to 19011 states and 22865 transitions. [2022-11-20 11:01:01,064 INFO L78 Accepts]: Start accepts. Automaton has 19011 states and 22865 transitions. Word has length 204 [2022-11-20 11:01:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:01,065 INFO L495 AbstractCegarLoop]: Abstraction has 19011 states and 22865 transitions. [2022-11-20 11:01:01,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 19011 states and 22865 transitions. [2022-11-20 11:01:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-20 11:01:01,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:01,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:01,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:01:01,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:01:01,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:01,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1944740812, now seen corresponding path program 1 times [2022-11-20 11:01:01,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:01,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536101849] [2022-11-20 11:01:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:01,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:01,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:01,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536101849] [2022-11-20 11:01:01,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536101849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:01,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932015473] [2022-11-20 11:01:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:01,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:01,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:01,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:01,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:01:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:01:02,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:01:02,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:02,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932015473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:02,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:02,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 11:01:02,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009929290] [2022-11-20 11:01:02,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:02,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:02,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:02,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:02,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:02,265 INFO L87 Difference]: Start difference. First operand 19011 states and 22865 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:03,530 INFO L93 Difference]: Finished difference Result 42894 states and 52535 transitions. [2022-11-20 11:01:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:03,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 206 [2022-11-20 11:01:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:03,598 INFO L225 Difference]: With dead ends: 42894 [2022-11-20 11:01:03,599 INFO L226 Difference]: Without dead ends: 24088 [2022-11-20 11:01:03,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:03,619 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 223 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:03,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:01:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24088 states. [2022-11-20 11:01:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24088 to 24084. [2022-11-20 11:01:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24084 states, 24083 states have (on average 1.1824523522816925) internal successors, (28477), 24083 states have internal predecessors, (28477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24084 states to 24084 states and 28477 transitions. [2022-11-20 11:01:04,072 INFO L78 Accepts]: Start accepts. Automaton has 24084 states and 28477 transitions. Word has length 206 [2022-11-20 11:01:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:04,072 INFO L495 AbstractCegarLoop]: Abstraction has 24084 states and 28477 transitions. [2022-11-20 11:01:04,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24084 states and 28477 transitions. [2022-11-20 11:01:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-20 11:01:04,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:04,101 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:04,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:04,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 11:01:04,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:04,309 INFO L85 PathProgramCache]: Analyzing trace with hash 885807587, now seen corresponding path program 1 times [2022-11-20 11:01:04,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:04,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702304688] [2022-11-20 11:01:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:04,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702304688] [2022-11-20 11:01:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702304688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:04,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761384260] [2022-11-20 11:01:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:04,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:04,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:04,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:01:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:01:04,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 11:01:05,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:05,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761384260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:05,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:05,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 11:01:05,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778997801] [2022-11-20 11:01:05,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:05,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:05,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:05,346 INFO L87 Difference]: Start difference. First operand 24084 states and 28477 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:06,511 INFO L93 Difference]: Finished difference Result 58778 states and 70029 transitions. [2022-11-20 11:01:06,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:06,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 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 215 [2022-11-20 11:01:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:06,575 INFO L225 Difference]: With dead ends: 58778 [2022-11-20 11:01:06,576 INFO L226 Difference]: Without dead ends: 35102 [2022-11-20 11:01:06,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:06,597 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:06,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 181 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:01:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35102 states. [2022-11-20 11:01:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35102 to 35086. [2022-11-20 11:01:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35086 states, 35085 states have (on average 1.1760866467151205) internal successors, (41263), 35085 states have internal predecessors, (41263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35086 states to 35086 states and 41263 transitions. [2022-11-20 11:01:07,222 INFO L78 Accepts]: Start accepts. Automaton has 35086 states and 41263 transitions. Word has length 215 [2022-11-20 11:01:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:07,222 INFO L495 AbstractCegarLoop]: Abstraction has 35086 states and 41263 transitions. [2022-11-20 11:01:07,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 35086 states and 41263 transitions. [2022-11-20 11:01:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-20 11:01:07,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:07,257 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:07,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:07,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash 382365, now seen corresponding path program 1 times [2022-11-20 11:01:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:07,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881960522] [2022-11-20 11:01:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:01:08,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881960522] [2022-11-20 11:01:08,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881960522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168988556] [2022-11-20 11:01:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:08,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:08,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:08,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:08,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:01:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:08,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:01:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:01:08,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:08,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168988556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:08,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:08,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 11:01:08,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756005373] [2022-11-20 11:01:08,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:08,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:08,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:08,717 INFO L87 Difference]: Start difference. First operand 35086 states and 41263 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:10,027 INFO L93 Difference]: Finished difference Result 84436 states and 99671 transitions. [2022-11-20 11:01:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:10,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 228 [2022-11-20 11:01:10,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:10,125 INFO L225 Difference]: With dead ends: 84436 [2022-11-20 11:01:10,126 INFO L226 Difference]: Without dead ends: 49758 [2022-11-20 11:01:10,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:10,164 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:10,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 218 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:01:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49758 states. [2022-11-20 11:01:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49758 to 47075. [2022-11-20 11:01:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47075 states, 47074 states have (on average 1.1830947019586184) internal successors, (55693), 47074 states have internal predecessors, (55693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47075 states to 47075 states and 55693 transitions. [2022-11-20 11:01:11,239 INFO L78 Accepts]: Start accepts. Automaton has 47075 states and 55693 transitions. Word has length 228 [2022-11-20 11:01:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:11,239 INFO L495 AbstractCegarLoop]: Abstraction has 47075 states and 55693 transitions. [2022-11-20 11:01:11,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 47075 states and 55693 transitions. [2022-11-20 11:01:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-20 11:01:11,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:11,297 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:11,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 11:01:11,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:01:11,518 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1347151785, now seen corresponding path program 1 times [2022-11-20 11:01:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:11,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023590245] [2022-11-20 11:01:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:11,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 11:01:12,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:12,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023590245] [2022-11-20 11:01:12,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023590245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:12,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529532984] [2022-11-20 11:01:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:12,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:12,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:12,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:12,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:01:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:01:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:01:12,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:12,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529532984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:12,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:12,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 11:01:12,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091021957] [2022-11-20 11:01:12,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:12,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:12,519 INFO L87 Difference]: Start difference. First operand 47075 states and 55693 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:13,660 INFO L93 Difference]: Finished difference Result 93745 states and 110937 transitions. [2022-11-20 11:01:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 245 [2022-11-20 11:01:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:13,722 INFO L225 Difference]: With dead ends: 93745 [2022-11-20 11:01:13,722 INFO L226 Difference]: Without dead ends: 47078 [2022-11-20 11:01:13,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:13,745 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 262 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:13,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 342 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:01:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47078 states. [2022-11-20 11:01:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47078 to 45856. [2022-11-20 11:01:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45856 states, 45855 states have (on average 1.1619234543670265) internal successors, (53280), 45855 states have internal predecessors, (53280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45856 states to 45856 states and 53280 transitions. [2022-11-20 11:01:14,653 INFO L78 Accepts]: Start accepts. Automaton has 45856 states and 53280 transitions. Word has length 245 [2022-11-20 11:01:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:14,654 INFO L495 AbstractCegarLoop]: Abstraction has 45856 states and 53280 transitions. [2022-11-20 11:01:14,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 45856 states and 53280 transitions. [2022-11-20 11:01:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-20 11:01:14,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:14,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:14,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:14,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:14,909 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash -974196740, now seen corresponding path program 1 times [2022-11-20 11:01:14,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:14,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024678348] [2022-11-20 11:01:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:14,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:01:15,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:15,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024678348] [2022-11-20 11:01:15,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024678348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:15,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127645314] [2022-11-20 11:01:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:15,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:15,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:15,702 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:15,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:01:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:15,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:01:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:01:15,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:15,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127645314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:15,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:15,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 11:01:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149862749] [2022-11-20 11:01:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:15,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:15,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:15,961 INFO L87 Difference]: Start difference. First operand 45856 states and 53280 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:17,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:17,259 INFO L93 Difference]: Finished difference Result 88239 states and 102175 transitions. [2022-11-20 11:01:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:17,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 246 [2022-11-20 11:01:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:17,325 INFO L225 Difference]: With dead ends: 88239 [2022-11-20 11:01:17,325 INFO L226 Difference]: Without dead ends: 42791 [2022-11-20 11:01:17,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:17,355 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 248 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:17,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 376 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:01:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42791 states. [2022-11-20 11:01:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42791 to 39332. [2022-11-20 11:01:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39332 states, 39331 states have (on average 1.1241260074750197) internal successors, (44213), 39331 states have internal predecessors, (44213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39332 states to 39332 states and 44213 transitions. [2022-11-20 11:01:18,154 INFO L78 Accepts]: Start accepts. Automaton has 39332 states and 44213 transitions. Word has length 246 [2022-11-20 11:01:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:18,155 INFO L495 AbstractCegarLoop]: Abstraction has 39332 states and 44213 transitions. [2022-11-20 11:01:18,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 39332 states and 44213 transitions. [2022-11-20 11:01:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-20 11:01:18,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:18,188 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:18,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:18,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:18,396 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:18,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash -35903996, now seen corresponding path program 1 times [2022-11-20 11:01:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:18,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178635967] [2022-11-20 11:01:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 91 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:01:19,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:19,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178635967] [2022-11-20 11:01:19,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178635967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:19,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284590979] [2022-11-20 11:01:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:19,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:19,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:19,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:19,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:01:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:01:19,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 11:01:19,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:19,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284590979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:19,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:19,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 11:01:19,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822999726] [2022-11-20 11:01:19,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:19,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:19,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:19,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:19,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:19,539 INFO L87 Difference]: Start difference. First operand 39332 states and 44213 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:20,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:20,685 INFO L93 Difference]: Finished difference Result 78057 states and 87771 transitions. [2022-11-20 11:01:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:20,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 247 [2022-11-20 11:01:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:20,731 INFO L225 Difference]: With dead ends: 78057 [2022-11-20 11:01:20,731 INFO L226 Difference]: Without dead ends: 39336 [2022-11-20 11:01:20,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:20,750 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 96 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:20,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 101 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:01:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39336 states. [2022-11-20 11:01:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39336 to 39332. [2022-11-20 11:01:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39332 states, 39331 states have (on average 1.1220157127965218) internal successors, (44130), 39331 states have internal predecessors, (44130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39332 states to 39332 states and 44130 transitions. [2022-11-20 11:01:21,368 INFO L78 Accepts]: Start accepts. Automaton has 39332 states and 44130 transitions. Word has length 247 [2022-11-20 11:01:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:21,369 INFO L495 AbstractCegarLoop]: Abstraction has 39332 states and 44130 transitions. [2022-11-20 11:01:21,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 39332 states and 44130 transitions. [2022-11-20 11:01:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-20 11:01:21,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:21,423 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:21,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:21,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:01:21,630 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:21,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1901025622, now seen corresponding path program 1 times [2022-11-20 11:01:21,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:21,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943186844] [2022-11-20 11:01:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:21,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 11:01:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943186844] [2022-11-20 11:01:22,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943186844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605710368] [2022-11-20 11:01:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:22,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:22,279 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:22,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:01:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:01:22,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 11:01:22,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:22,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605710368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:22,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:22,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 11:01:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450519793] [2022-11-20 11:01:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:22,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:22,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:22,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:22,539 INFO L87 Difference]: Start difference. First operand 39332 states and 44130 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:23,203 INFO L93 Difference]: Finished difference Result 113467 states and 127351 transitions. [2022-11-20 11:01:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 275 [2022-11-20 11:01:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:23,279 INFO L225 Difference]: With dead ends: 113467 [2022-11-20 11:01:23,280 INFO L226 Difference]: Without dead ends: 74746 [2022-11-20 11:01:23,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:23,304 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 307 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:23,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 865 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:01:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74746 states. [2022-11-20 11:01:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74746 to 68041. [2022-11-20 11:01:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68041 states, 68040 states have (on average 1.112962962962963) internal successors, (75726), 68040 states have internal predecessors, (75726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68041 states to 68041 states and 75726 transitions. [2022-11-20 11:01:24,361 INFO L78 Accepts]: Start accepts. Automaton has 68041 states and 75726 transitions. Word has length 275 [2022-11-20 11:01:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:24,361 INFO L495 AbstractCegarLoop]: Abstraction has 68041 states and 75726 transitions. [2022-11-20 11:01:24,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 68041 states and 75726 transitions. [2022-11-20 11:01:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-11-20 11:01:24,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:24,406 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:24,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:24,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:01:24,606 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1302108884, now seen corresponding path program 1 times [2022-11-20 11:01:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:24,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398738030] [2022-11-20 11:01:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:24,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:01:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398738030] [2022-11-20 11:01:25,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398738030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720486586] [2022-11-20 11:01:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:25,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:25,511 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:25,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:01:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:25,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:01:25,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 11:01:26,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:26,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720486586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:26,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:26,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 11:01:26,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084280489] [2022-11-20 11:01:26,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:26,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:26,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:26,155 INFO L87 Difference]: Start difference. First operand 68041 states and 75726 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:27,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:27,757 INFO L93 Difference]: Finished difference Result 134864 states and 150119 transitions. [2022-11-20 11:01:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 280 [2022-11-20 11:01:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:27,826 INFO L225 Difference]: With dead ends: 134864 [2022-11-20 11:01:27,826 INFO L226 Difference]: Without dead ends: 67434 [2022-11-20 11:01:27,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:01:27,844 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:27,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 372 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:01:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67434 states. [2022-11-20 11:01:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67434 to 64996. [2022-11-20 11:01:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64996 states, 64995 states have (on average 1.0931610123855682) internal successors, (71050), 64995 states have internal predecessors, (71050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64996 states to 64996 states and 71050 transitions. [2022-11-20 11:01:28,722 INFO L78 Accepts]: Start accepts. Automaton has 64996 states and 71050 transitions. Word has length 280 [2022-11-20 11:01:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:28,722 INFO L495 AbstractCegarLoop]: Abstraction has 64996 states and 71050 transitions. [2022-11-20 11:01:28,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 64996 states and 71050 transitions. [2022-11-20 11:01:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-11-20 11:01:28,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:28,774 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:28,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:28,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:01:28,975 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:28,975 INFO L85 PathProgramCache]: Analyzing trace with hash 677487726, now seen corresponding path program 1 times [2022-11-20 11:01:28,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:28,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887638282] [2022-11-20 11:01:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:28,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-20 11:01:29,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:29,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887638282] [2022-11-20 11:01:29,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887638282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:29,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651036615] [2022-11-20 11:01:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:29,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:29,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:29,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:29,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:01:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:01:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:01:30,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:01:30,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651036615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:30,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:01:30,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-11-20 11:01:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200293301] [2022-11-20 11:01:30,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:30,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:01:30,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:01:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:30,352 INFO L87 Difference]: Start difference. First operand 64996 states and 71050 transitions. Second operand has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:36,357 INFO L93 Difference]: Finished difference Result 262013 states and 287924 transitions. [2022-11-20 11:01:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:01:36,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 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 315 [2022-11-20 11:01:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:36,613 INFO L225 Difference]: With dead ends: 262013 [2022-11-20 11:01:36,613 INFO L226 Difference]: Without dead ends: 197425 [2022-11-20 11:01:36,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:01:36,655 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 2916 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 3959 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2916 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 4524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 3959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:36,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2916 Valid, 441 Invalid, 4524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 3959 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-20 11:01:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197425 states. [2022-11-20 11:01:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197425 to 194495. [2022-11-20 11:01:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194495 states, 194494 states have (on average 1.0928923257272718) internal successors, (212561), 194494 states have internal predecessors, (212561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194495 states to 194495 states and 212561 transitions. [2022-11-20 11:01:39,778 INFO L78 Accepts]: Start accepts. Automaton has 194495 states and 212561 transitions. Word has length 315 [2022-11-20 11:01:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:39,779 INFO L495 AbstractCegarLoop]: Abstraction has 194495 states and 212561 transitions. [2022-11-20 11:01:39,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 194495 states and 212561 transitions. [2022-11-20 11:01:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-20 11:01:39,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:39,878 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:39,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:40,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:01:40,081 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash 939208580, now seen corresponding path program 1 times [2022-11-20 11:01:40,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:40,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483804589] [2022-11-20 11:01:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:40,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 177 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:01:41,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:41,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483804589] [2022-11-20 11:01:41,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483804589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:41,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670638049] [2022-11-20 11:01:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:41,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:41,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:41,307 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:41,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:01:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:01:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 11:01:41,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:41,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670638049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:41,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:41,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 11:01:41,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129266925] [2022-11-20 11:01:41,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:41,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:01:41,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:01:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:01:41,848 INFO L87 Difference]: Start difference. First operand 194495 states and 212561 transitions. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:44,328 INFO L93 Difference]: Finished difference Result 397537 states and 434235 transitions. [2022-11-20 11:01:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:01:44,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 330 [2022-11-20 11:01:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:44,560 INFO L225 Difference]: With dead ends: 397537 [2022-11-20 11:01:44,560 INFO L226 Difference]: Without dead ends: 203856 [2022-11-20 11:01:44,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:01:44,629 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 441 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:44,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 200 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:01:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203856 states. [2022-11-20 11:01:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203856 to 196931. [2022-11-20 11:01:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196931 states, 196930 states have (on average 1.0883918143502767) internal successors, (214337), 196930 states have internal predecessors, (214337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196931 states to 196931 states and 214337 transitions. [2022-11-20 11:01:48,077 INFO L78 Accepts]: Start accepts. Automaton has 196931 states and 214337 transitions. Word has length 330 [2022-11-20 11:01:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:48,078 INFO L495 AbstractCegarLoop]: Abstraction has 196931 states and 214337 transitions. [2022-11-20 11:01:48,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 196931 states and 214337 transitions. [2022-11-20 11:01:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-11-20 11:01:48,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:48,170 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:48,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:48,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:01:48,377 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:48,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1410722384, now seen corresponding path program 1 times [2022-11-20 11:01:48,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:48,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745629830] [2022-11-20 11:01:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:48,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 176 proven. 11 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:01:49,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:49,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745629830] [2022-11-20 11:01:49,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745629830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:49,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064777616] [2022-11-20 11:01:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:49,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:49,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:49,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:49,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_821b1d1a-eadc-40a4-b047-78982a5ca5e6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:01:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:49,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:01:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:01:49,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:49,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064777616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:49,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:49,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 11:01:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89026810] [2022-11-20 11:01:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:49,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:01:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:01:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:49,872 INFO L87 Difference]: Start difference. First operand 196931 states and 214337 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:53,318 INFO L93 Difference]: Finished difference Result 448636 states and 489252 transitions. [2022-11-20 11:01:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:01:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 346 [2022-11-20 11:01:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:53,762 INFO L225 Difference]: With dead ends: 448636 [2022-11-20 11:01:53,762 INFO L226 Difference]: Without dead ends: 252113 [2022-11-20 11:01:53,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:53,897 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 353 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:53,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 154 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 11:01:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252113 states. [2022-11-20 11:01:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252113 to 200964. [2022-11-20 11:01:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200964 states, 200963 states have (on average 1.0762727467245214) internal successors, (216291), 200963 states have internal predecessors, (216291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)