./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/half_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro --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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- 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-8393723 [2022-11-18 20:26:45,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:26:45,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:26:45,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:26:45,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:26:45,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:26:45,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:26:45,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:26:45,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:26:45,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:26:45,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:26:45,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:26:45,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:26:45,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:26:45,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:26:45,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:26:45,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:26:45,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:26:45,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:26:45,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:26:45,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:26:45,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:26:45,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:26:45,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:26:45,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:26:45,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:26:45,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:26:45,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:26:45,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:26:45,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:26:45,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:26:45,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:26:45,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:26:45,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:26:45,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:26:45,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:26:45,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:26:45,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:26:45,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:26:45,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:26:45,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:26:45,163 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:26:45,210 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:26:45,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:26:45,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:26:45,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:26:45,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:26:45,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:26:45,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:26:45,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:26:45,213 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:26:45,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:26:45,215 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:26:45,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:26:45,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:26:45,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:26:45,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:26:45,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:26:45,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:26:45,216 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:26:45,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:26:45,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:26:45,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:26:45,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:26:45,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:26:45,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:26:45,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:26:45,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:26:45,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:26:45,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:26:45,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:26:45,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:26:45,220 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:26:45,221 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:26:45,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:26:45,221 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_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2022-11-18 20:26:45,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:26:45,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:26:45,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:26:45,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:26:45,565 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:26:45,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/loop-invgen/half_2.i [2022-11-18 20:26:45,633 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/data/7e62081e8/cf11bfb2be5046c48a413ebdffd06705/FLAG6b5871f5d [2022-11-18 20:26:46,143 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:26:46,144 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/sv-benchmarks/c/loop-invgen/half_2.i [2022-11-18 20:26:46,150 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/data/7e62081e8/cf11bfb2be5046c48a413ebdffd06705/FLAG6b5871f5d [2022-11-18 20:26:46,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/data/7e62081e8/cf11bfb2be5046c48a413ebdffd06705 [2022-11-18 20:26:46,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:26:46,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:26:46,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:26:46,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:26:46,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:26:46,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f907e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46, skipping insertion in model container [2022-11-18 20:26:46,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:26:46,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:26:46,734 WARN L234 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_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2022-11-18 20:26:46,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:26:46,758 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:26:46,769 WARN L234 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_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2022-11-18 20:26:46,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:26:46,789 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:26:46,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46 WrapperNode [2022-11-18 20:26:46,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:26:46,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:26:46,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:26:46,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:26:46,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,829 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-11-18 20:26:46,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:26:46,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:26:46,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:26:46,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:26:46,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,850 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:26:46,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:26:46,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:26:46,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:26:46,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (1/1) ... [2022-11-18 20:26:46,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:26:46,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:46,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:26:46,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:26:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:26:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:26:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:26:46,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:26:46,999 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:26:47,002 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:26:47,135 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:26:47,142 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:26:47,142 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:26:47,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:26:47 BoogieIcfgContainer [2022-11-18 20:26:47,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:26:47,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:26:47,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:26:47,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:26:47,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:26:46" (1/3) ... [2022-11-18 20:26:47,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64448e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:26:47, skipping insertion in model container [2022-11-18 20:26:47,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:46" (2/3) ... [2022-11-18 20:26:47,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64448e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:26:47, skipping insertion in model container [2022-11-18 20:26:47,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:26:47" (3/3) ... [2022-11-18 20:26:47,157 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2022-11-18 20:26:47,180 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:26:47,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:26:47,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:26:47,247 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;@309f99a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:26:47,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:26:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:26:47,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:47,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:47,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:47,269 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2022-11-18 20:26:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:47,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715498325] [2022-11-18 20:26:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:47,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:47,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:47,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715498325] [2022-11-18 20:26:47,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715498325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:47,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:47,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:26:47,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041245056] [2022-11-18 20:26:47,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:47,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:26:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:47,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:26:47,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:26:47,552 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:47,571 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2022-11-18 20:26:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:26:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-18 20:26:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:47,592 INFO L225 Difference]: With dead ends: 24 [2022-11-18 20:26:47,592 INFO L226 Difference]: Without dead ends: 10 [2022-11-18 20:26:47,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:26:47,605 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:47,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:26:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-18 20:26:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-18 20:26:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-18 20:26:47,648 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-11-18 20:26:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:47,649 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-18 20:26:47,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-18 20:26:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:26:47,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:47,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:47,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:26:47,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2022-11-18 20:26:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:47,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559784865] [2022-11-18 20:26:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:47,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:48,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559784865] [2022-11-18 20:26:48,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559784865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:48,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:48,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:26:48,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727374302] [2022-11-18 20:26:48,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:48,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:26:48,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:26:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:26:48,060 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:48,174 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-11-18 20:26:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:26:48,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-18 20:26:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:48,176 INFO L225 Difference]: With dead ends: 18 [2022-11-18 20:26:48,176 INFO L226 Difference]: Without dead ends: 16 [2022-11-18 20:26:48,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:26:48,179 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:48,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:26:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-18 20:26:48,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-11-18 20:26:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-18 20:26:48,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-18 20:26:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:48,216 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-18 20:26:48,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-18 20:26:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:26:48,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:48,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:48,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:26:48,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2022-11-18 20:26:48,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:48,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569667432] [2022-11-18 20:26:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:48,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569667432] [2022-11-18 20:26:48,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569667432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615898693] [2022-11-18 20:26:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:48,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:48,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:48,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:26:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:26:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:48,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:49,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615898693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:49,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:49,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 20:26:49,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263391380] [2022-11-18 20:26:49,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:49,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:26:49,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:26:49,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:26:49,048 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:49,674 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-18 20:26:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:26:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:26:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:49,676 INFO L225 Difference]: With dead ends: 41 [2022-11-18 20:26:49,677 INFO L226 Difference]: Without dead ends: 39 [2022-11-18 20:26:49,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:26:49,685 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:49,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:26:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-18 20:26:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2022-11-18 20:26:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-18 20:26:49,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-11-18 20:26:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:49,703 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-18 20:26:49,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-18 20:26:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:26:49,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:49,704 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:49,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:49,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:49,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:49,912 INFO L85 PathProgramCache]: Analyzing trace with hash -424251923, now seen corresponding path program 2 times [2022-11-18 20:26:49,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:49,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54383520] [2022-11-18 20:26:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:49,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:50,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:50,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54383520] [2022-11-18 20:26:50,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54383520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:50,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260838656] [2022-11-18 20:26:50,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:26:50,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:50,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:50,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:26:50,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:26:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:50,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:26:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:50,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:50,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260838656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:50,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:50,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-18 20:26:50,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743848527] [2022-11-18 20:26:50,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:50,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:26:50,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:50,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:26:50,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:26:50,453 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:50,943 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-11-18 20:26:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:26:50,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 20:26:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:50,949 INFO L225 Difference]: With dead ends: 51 [2022-11-18 20:26:50,949 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 20:26:50,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:26:50,957 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:50,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 85 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:26:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 20:26:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 19. [2022-11-18 20:26:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-18 20:26:50,974 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2022-11-18 20:26:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:50,976 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-18 20:26:50,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-18 20:26:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:26:50,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:50,978 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:50,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:51,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:51,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash 34157897, now seen corresponding path program 1 times [2022-11-18 20:26:51,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:51,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251501047] [2022-11-18 20:26:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251501047] [2022-11-18 20:26:51,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251501047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132544125] [2022-11-18 20:26:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:51,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:51,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:26:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:51,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:26:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:51,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:26:51,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132544125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:51,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:26:51,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-18 20:26:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566184711] [2022-11-18 20:26:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:51,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:26:51,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:26:51,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:26:51,437 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:51,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:51,486 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-11-18 20:26:51,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:26:51,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 20:26:51,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:51,488 INFO L225 Difference]: With dead ends: 27 [2022-11-18 20:26:51,488 INFO L226 Difference]: Without dead ends: 19 [2022-11-18 20:26:51,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:26:51,489 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:51,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:26:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-18 20:26:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-18 20:26:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-18 20:26:51,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-11-18 20:26:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:51,497 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-18 20:26:51,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-18 20:26:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:26:51,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:51,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:51,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:51,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:51,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1874485687, now seen corresponding path program 1 times [2022-11-18 20:26:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:51,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377480010] [2022-11-18 20:26:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:51,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377480010] [2022-11-18 20:26:51,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377480010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:51,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425275059] [2022-11-18 20:26:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:51,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:51,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:52,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:26:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:52,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:26:52,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:52,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:52,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425275059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:52,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:52,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-11-18 20:26:52,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511746584] [2022-11-18 20:26:52,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:52,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:26:52,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:52,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:26:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:26:52,531 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:53,299 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-11-18 20:26:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:26:53,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 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 13 [2022-11-18 20:26:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:53,301 INFO L225 Difference]: With dead ends: 47 [2022-11-18 20:26:53,301 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 20:26:53,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:26:53,304 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 86 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:53,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 42 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:26:53,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 20:26:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2022-11-18 20:26:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-18 20:26:53,325 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-11-18 20:26:53,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:53,325 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-18 20:26:53,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-18 20:26:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:26:53,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:53,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:53,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:53,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:53,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash -17212563, now seen corresponding path program 2 times [2022-11-18 20:26:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526220414] [2022-11-18 20:26:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:53,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:53,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:53,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526220414] [2022-11-18 20:26:53,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526220414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:53,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025425554] [2022-11-18 20:26:53,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:26:53,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:53,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:54,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:26:54,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:26:54,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:54,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:26:54,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:54,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:54,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025425554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:54,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:54,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-11-18 20:26:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71355755] [2022-11-18 20:26:54,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:54,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:26:54,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:26:54,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:26:54,750 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:55,818 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-18 20:26:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:26:55,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 20:26:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:55,822 INFO L225 Difference]: With dead ends: 49 [2022-11-18 20:26:55,822 INFO L226 Difference]: Without dead ends: 34 [2022-11-18 20:26:55,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:26:55,824 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:55,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 55 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:26:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-18 20:26:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-11-18 20:26:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-18 20:26:55,842 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-11-18 20:26:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:55,842 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-18 20:26:55,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-18 20:26:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:26:55,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:55,845 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:55,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:56,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:56,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash 38169965, now seen corresponding path program 3 times [2022-11-18 20:26:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:56,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433103291] [2022-11-18 20:26:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:56,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:56,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433103291] [2022-11-18 20:26:56,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433103291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:56,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343886503] [2022-11-18 20:26:56,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:26:56,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:56,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:56,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:56,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:26:56,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:26:56,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:56,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:26:56,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:56,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:56,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343886503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:56,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:56,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-11-18 20:26:56,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91345687] [2022-11-18 20:26:56,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:56,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 20:26:56,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 20:26:56,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:26:56,873 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:57,749 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-11-18 20:26:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:26:57,750 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 20:26:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:57,750 INFO L225 Difference]: With dead ends: 82 [2022-11-18 20:26:57,750 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 20:26:57,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=750, Invalid=2220, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:26:57,753 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 135 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:57,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 105 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:26:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 20:26:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2022-11-18 20:26:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-18 20:26:57,802 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2022-11-18 20:26:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:57,802 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-18 20:26:57,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-18 20:26:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:26:57,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:57,804 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:57,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:58,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:26:58,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash -756727863, now seen corresponding path program 4 times [2022-11-18 20:26:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:58,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122590070] [2022-11-18 20:26:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:58,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:58,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:58,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122590070] [2022-11-18 20:26:58,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122590070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:58,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990397958] [2022-11-18 20:26:58,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:26:58,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:58,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:58,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:58,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:26:58,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:26:58,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:58,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:26:58,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:58,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:59,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990397958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:59,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:59,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-11-18 20:26:59,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108712738] [2022-11-18 20:26:59,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:59,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:26:59,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:59,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:26:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:26:59,558 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:00,202 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-18 20:27:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:27:00,203 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 20:27:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:00,204 INFO L225 Difference]: With dead ends: 56 [2022-11-18 20:27:00,204 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 20:27:00,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:27:00,205 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:00,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:27:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 20:27:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-11-18 20:27:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-18 20:27:00,235 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2022-11-18 20:27:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:00,235 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-18 20:27:00,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-18 20:27:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:27:00,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:00,237 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:00,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:00,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:00,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 5 times [2022-11-18 20:27:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:00,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237792391] [2022-11-18 20:27:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:01,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:01,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237792391] [2022-11-18 20:27:01,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237792391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:01,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044635746] [2022-11-18 20:27:01,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:27:01,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:01,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:01,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:01,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:27:01,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:27:01,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:01,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:27:01,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:01,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:02,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044635746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:02,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:02,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 36 [2022-11-18 20:27:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20516070] [2022-11-18 20:27:02,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:02,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:27:02,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:27:02,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:27:02,449 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:04,407 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-11-18 20:27:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:27:04,407 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 20:27:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:04,410 INFO L225 Difference]: With dead ends: 93 [2022-11-18 20:27:04,410 INFO L226 Difference]: Without dead ends: 72 [2022-11-18 20:27:04,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=604, Invalid=3056, Unknown=0, NotChecked=0, Total=3660 [2022-11-18 20:27:04,413 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 131 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:04,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 87 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:27:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-18 20:27:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2022-11-18 20:27:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-18 20:27:04,463 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2022-11-18 20:27:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:04,464 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-18 20:27:04,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:04,464 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-18 20:27:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:27:04,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:04,465 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:04,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:04,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:27:04,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1059897673, now seen corresponding path program 6 times [2022-11-18 20:27:04,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:04,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116608162] [2022-11-18 20:27:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:04,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:05,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116608162] [2022-11-18 20:27:05,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116608162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:05,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440233738] [2022-11-18 20:27:05,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:27:05,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:05,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:05,383 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:05,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:27:05,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:27:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:05,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 20:27:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:06,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:07,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440233738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:07,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:07,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2022-11-18 20:27:07,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709897566] [2022-11-18 20:27:07,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:07,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:27:07,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:07,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:27:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:27:07,361 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:08,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:08,872 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-11-18 20:27:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:27:08,873 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-18 20:27:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:08,874 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:27:08,874 INFO L226 Difference]: Without dead ends: 36 [2022-11-18 20:27:08,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=562, Invalid=3598, Unknown=0, NotChecked=0, Total=4160 [2022-11-18 20:27:08,876 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 71 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:08,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 93 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:27:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-18 20:27:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-11-18 20:27:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-11-18 20:27:08,905 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-11-18 20:27:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:08,905 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-11-18 20:27:08,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-11-18 20:27:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 20:27:08,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:08,906 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:08,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:09,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:27:09,112 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:09,112 INFO L85 PathProgramCache]: Analyzing trace with hash -138352531, now seen corresponding path program 7 times [2022-11-18 20:27:09,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:09,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858309925] [2022-11-18 20:27:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:09,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:09,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858309925] [2022-11-18 20:27:09,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858309925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:09,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659696713] [2022-11-18 20:27:09,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:27:09,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:09,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:09,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:27:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:09,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 20:27:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:10,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:11,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659696713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:11,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:11,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-11-18 20:27:11,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469085716] [2022-11-18 20:27:11,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:11,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:27:11,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:27:11,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:27:11,628 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:14,348 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-11-18 20:27:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:27:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-18 20:27:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:14,350 INFO L225 Difference]: With dead ends: 93 [2022-11-18 20:27:14,350 INFO L226 Difference]: Without dead ends: 66 [2022-11-18 20:27:14,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=895, Invalid=4957, Unknown=0, NotChecked=0, Total=5852 [2022-11-18 20:27:14,353 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 160 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:14,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 120 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:27:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-18 20:27:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-11-18 20:27:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-18 20:27:14,388 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 33 [2022-11-18 20:27:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:14,389 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-18 20:27:14,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-18 20:27:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 20:27:14,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:14,390 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:14,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:14,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:14,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1196154167, now seen corresponding path program 8 times [2022-11-18 20:27:14,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:14,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904415662] [2022-11-18 20:27:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:14,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:15,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:15,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904415662] [2022-11-18 20:27:15,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904415662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:15,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303067612] [2022-11-18 20:27:15,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:27:15,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:15,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:15,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:15,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:27:15,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:27:15,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:27:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:16,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:17,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303067612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:17,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:17,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-11-18 20:27:17,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542240925] [2022-11-18 20:27:17,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:17,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:27:17,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:17,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:27:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:27:17,487 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:20,991 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-11-18 20:27:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 20:27:20,992 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-18 20:27:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:20,993 INFO L225 Difference]: With dead ends: 124 [2022-11-18 20:27:20,993 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 20:27:20,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1097, Invalid=6213, Unknown=0, NotChecked=0, Total=7310 [2022-11-18 20:27:20,996 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 187 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:20,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 141 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:27:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 20:27:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-11-18 20:27:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-18 20:27:21,091 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 37 [2022-11-18 20:27:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:21,094 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-18 20:27:21,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-18 20:27:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:27:21,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:21,104 INFO L195 NwaCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:21,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:21,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:21,310 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:21,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:21,310 INFO L85 PathProgramCache]: Analyzing trace with hash -826667923, now seen corresponding path program 9 times [2022-11-18 20:27:21,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:21,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996593950] [2022-11-18 20:27:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:21,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:22,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:22,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996593950] [2022-11-18 20:27:22,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996593950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:22,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485263289] [2022-11-18 20:27:22,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:27:22,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:22,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:22,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:22,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:27:22,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 20:27:22,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:22,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:27:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:22,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:23,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485263289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:23,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:23,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-11-18 20:27:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855969890] [2022-11-18 20:27:23,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:23,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-18 20:27:23,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-18 20:27:23,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 20:27:23,404 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:25,663 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2022-11-18 20:27:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-18 20:27:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-18 20:27:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:25,665 INFO L225 Difference]: With dead ends: 266 [2022-11-18 20:27:25,665 INFO L226 Difference]: Without dead ends: 264 [2022-11-18 20:27:25,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3111, Invalid=9771, Unknown=0, NotChecked=0, Total=12882 [2022-11-18 20:27:25,669 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 370 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:25,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 210 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:27:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-18 20:27:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 72. [2022-11-18 20:27:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-11-18 20:27:25,746 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 41 [2022-11-18 20:27:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:25,746 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-11-18 20:27:25,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-11-18 20:27:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:27:25,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:25,748 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:25,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:25,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:27:25,951 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1395466515, now seen corresponding path program 10 times [2022-11-18 20:27:25,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:25,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569949795] [2022-11-18 20:27:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:27,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569949795] [2022-11-18 20:27:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569949795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811953792] [2022-11-18 20:27:27,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:27:27,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:27,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:27,050 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:27,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:27:27,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:27:27,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 20:27:27,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:27,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:29,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811953792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:29,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:29,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 56 [2022-11-18 20:27:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343899158] [2022-11-18 20:27:29,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 20:27:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 20:27:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2605, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 20:27:29,332 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:33,786 INFO L93 Difference]: Finished difference Result 277 states and 289 transitions. [2022-11-18 20:27:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-18 20:27:33,787 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-18 20:27:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:33,789 INFO L225 Difference]: With dead ends: 277 [2022-11-18 20:27:33,789 INFO L226 Difference]: Without dead ends: 244 [2022-11-18 20:27:33,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1394, Invalid=7918, Unknown=0, NotChecked=0, Total=9312 [2022-11-18 20:27:33,800 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 250 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:33,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 151 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:27:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-18 20:27:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 71. [2022-11-18 20:27:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-11-18 20:27:33,888 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 41 [2022-11-18 20:27:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:33,888 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-11-18 20:27:33,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-11-18 20:27:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:27:33,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:33,889 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:33,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:27:34,095 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 286483529, now seen corresponding path program 11 times [2022-11-18 20:27:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969513145] [2022-11-18 20:27:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:34,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:35,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969513145] [2022-11-18 20:27:35,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969513145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965208744] [2022-11-18 20:27:35,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:27:35,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:35,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:35,483 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:35,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:27:35,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 20:27:35,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:27:35,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:36,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:38,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965208744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:38,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:38,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 61 [2022-11-18 20:27:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729563762] [2022-11-18 20:27:38,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:38,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-18 20:27:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-18 20:27:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3097, Unknown=0, NotChecked=0, Total=3660 [2022-11-18 20:27:38,331 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:43,845 INFO L93 Difference]: Finished difference Result 268 states and 281 transitions. [2022-11-18 20:27:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-18 20:27:43,845 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-18 20:27:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:43,847 INFO L225 Difference]: With dead ends: 268 [2022-11-18 20:27:43,847 INFO L226 Difference]: Without dead ends: 232 [2022-11-18 20:27:43,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1644, Invalid=9486, Unknown=0, NotChecked=0, Total=11130 [2022-11-18 20:27:43,849 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 262 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:43,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 192 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:27:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-18 20:27:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 70. [2022-11-18 20:27:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-11-18 20:27:43,925 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 45 [2022-11-18 20:27:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:43,926 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-11-18 20:27:43,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-11-18 20:27:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:27:43,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:43,927 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:43,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:44,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:27:44,131 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1446573421, now seen corresponding path program 12 times [2022-11-18 20:27:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:44,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242179767] [2022-11-18 20:27:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:44,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:45,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242179767] [2022-11-18 20:27:45,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242179767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593906870] [2022-11-18 20:27:45,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:27:45,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:45,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:45,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:45,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:27:45,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-18 20:27:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:27:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:46,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:49,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593906870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:49,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:49,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 78 [2022-11-18 20:27:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818681410] [2022-11-18 20:27:49,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:49,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-18 20:27:49,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-18 20:27:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=5264, Unknown=0, NotChecked=0, Total=6006 [2022-11-18 20:27:49,150 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:53,526 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2022-11-18 20:27:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 20:27:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-18 20:27:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:53,527 INFO L225 Difference]: With dead ends: 117 [2022-11-18 20:27:53,528 INFO L226 Difference]: Without dead ends: 78 [2022-11-18 20:27:53,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1364, Invalid=9766, Unknown=0, NotChecked=0, Total=11130 [2022-11-18 20:27:53,530 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:53,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 100 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:27:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-18 20:27:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2022-11-18 20:27:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-11-18 20:27:53,606 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 49 [2022-11-18 20:27:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:53,606 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-11-18 20:27:53,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-11-18 20:27:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-18 20:27:53,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:53,607 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:53,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:53,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:27:53,811 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:53,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2015197751, now seen corresponding path program 13 times [2022-11-18 20:27:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:53,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598241650] [2022-11-18 20:27:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:55,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:55,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598241650] [2022-11-18 20:27:55,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598241650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:55,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751706446] [2022-11-18 20:27:55,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:27:55,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:55,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:55,360 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:55,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:27:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:27:55,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:56,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:58,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751706446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:58,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:58,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2022-11-18 20:27:58,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583148995] [2022-11-18 20:27:58,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:58,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-18 20:27:58,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-18 20:27:58,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 20:27:58,767 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:05,819 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2022-11-18 20:28:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:28:05,820 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-18 20:28:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:05,821 INFO L225 Difference]: With dead ends: 232 [2022-11-18 20:28:05,821 INFO L226 Difference]: Without dead ends: 190 [2022-11-18 20:28:05,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3801 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2115, Invalid=12647, Unknown=0, NotChecked=0, Total=14762 [2022-11-18 20:28:05,824 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 305 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:05,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 229 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 20:28:05,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-18 20:28:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 68. [2022-11-18 20:28:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-11-18 20:28:05,902 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 53 [2022-11-18 20:28:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:05,902 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-11-18 20:28:05,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-11-18 20:28:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 20:28:05,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:05,903 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:05,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:06,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:28:06,104 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:06,105 INFO L85 PathProgramCache]: Analyzing trace with hash 895167469, now seen corresponding path program 14 times [2022-11-18 20:28:06,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:06,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743346] [2022-11-18 20:28:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:06,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:07,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:07,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743346] [2022-11-18 20:28:07,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:07,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443145551] [2022-11-18 20:28:07,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:28:07,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:07,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:07,839 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:07,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:28:07,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:28:07,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-18 20:28:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:09,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:12,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443145551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:12,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:12,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 89 [2022-11-18 20:28:12,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609901222] [2022-11-18 20:28:12,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:12,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-18 20:28:12,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-18 20:28:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1070, Invalid=6762, Unknown=0, NotChecked=0, Total=7832 [2022-11-18 20:28:12,606 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:22,994 INFO L93 Difference]: Finished difference Result 205 states and 221 transitions. [2022-11-18 20:28:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-18 20:28:22,995 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-18 20:28:22,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:22,996 INFO L225 Difference]: With dead ends: 205 [2022-11-18 20:28:22,996 INFO L226 Difference]: Without dead ends: 160 [2022-11-18 20:28:22,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6748 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3012, Invalid=19040, Unknown=0, NotChecked=0, Total=22052 [2022-11-18 20:28:22,998 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 372 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:22,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 294 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 20:28:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-18 20:28:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 67. [2022-11-18 20:28:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-11-18 20:28:23,077 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2022-11-18 20:28:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:23,077 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-11-18 20:28:23,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-11-18 20:28:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 20:28:23,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:23,078 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:23,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:23,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:23,279 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1253672777, now seen corresponding path program 15 times [2022-11-18 20:28:23,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:23,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139080285] [2022-11-18 20:28:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:23,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:25,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:25,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139080285] [2022-11-18 20:28:25,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139080285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:25,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858369610] [2022-11-18 20:28:25,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:28:25,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:25,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:25,244 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:25,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:28:25,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-18 20:28:25,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:28:25,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:27,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:31,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858369610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:31,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:31,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 36] total 100 [2022-11-18 20:28:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460492425] [2022-11-18 20:28:31,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-18 20:28:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-18 20:28:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=8718, Unknown=0, NotChecked=0, Total=9900 [2022-11-18 20:28:31,256 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:37,714 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-11-18 20:28:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 20:28:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 0 states have call successors, (0), 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 61 [2022-11-18 20:28:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:37,715 INFO L225 Difference]: With dead ends: 116 [2022-11-18 20:28:37,715 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:28:37,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4730 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2173, Invalid=15917, Unknown=0, NotChecked=0, Total=18090 [2022-11-18 20:28:37,717 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 208 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:37,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 141 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:28:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:28:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-18 20:28:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-11-18 20:28:37,806 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2022-11-18 20:28:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:37,807 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-11-18 20:28:37,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-11-18 20:28:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 20:28:37,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:37,808 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:37,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-18 20:28:38,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:38,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash -576617875, now seen corresponding path program 16 times [2022-11-18 20:28:38,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:38,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329037016] [2022-11-18 20:28:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:38,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:40,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:40,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329037016] [2022-11-18 20:28:40,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329037016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:40,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730682013] [2022-11-18 20:28:40,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:28:40,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:40,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:40,004 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:40,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:28:40,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:28:40,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-18 20:28:40,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:41,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:44,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730682013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:44,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:44,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 86 [2022-11-18 20:28:44,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782135110] [2022-11-18 20:28:44,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:44,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-18 20:28:44,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-18 20:28:44,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=6232, Unknown=0, NotChecked=0, Total=7310 [2022-11-18 20:28:44,556 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:54,549 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2022-11-18 20:28:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-18 20:28:54,549 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 0 states have call successors, (0), 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 65 [2022-11-18 20:28:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:54,551 INFO L225 Difference]: With dead ends: 181 [2022-11-18 20:28:54,551 INFO L226 Difference]: Without dead ends: 130 [2022-11-18 20:28:54,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5960 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=3209, Invalid=19441, Unknown=0, NotChecked=0, Total=22650 [2022-11-18 20:28:54,553 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 440 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:54,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 340 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-18 20:28:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-18 20:28:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2022-11-18 20:28:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-11-18 20:28:54,682 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 65 [2022-11-18 20:28:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:54,682 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-11-18 20:28:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-11-18 20:28:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:28:54,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:54,684 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:54,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:54,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:54,884 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash -181376823, now seen corresponding path program 17 times [2022-11-18 20:28:54,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:54,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224617518] [2022-11-18 20:28:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:54,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:56,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224617518] [2022-11-18 20:28:56,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224617518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274321153] [2022-11-18 20:28:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:28:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:56,835 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:56,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:28:56,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-18 20:28:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:28:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:58,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:01,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274321153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:01,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:01,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 91 [2022-11-18 20:29:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557491431] [2022-11-18 20:29:01,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:01,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-18 20:29:01,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-18 20:29:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1212, Invalid=6978, Unknown=0, NotChecked=0, Total=8190 [2022-11-18 20:29:01,487 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:12,360 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2022-11-18 20:29:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 20:29:12,360 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 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 69 [2022-11-18 20:29:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:12,361 INFO L225 Difference]: With dead ends: 236 [2022-11-18 20:29:12,361 INFO L226 Difference]: Without dead ends: 182 [2022-11-18 20:29:12,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6846 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=3634, Invalid=22126, Unknown=0, NotChecked=0, Total=25760 [2022-11-18 20:29:12,364 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 453 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 3327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:12,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 450 Invalid, 3327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-18 20:29:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-18 20:29:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2022-11-18 20:29:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2022-11-18 20:29:12,563 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 69 [2022-11-18 20:29:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:12,563 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2022-11-18 20:29:12,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2022-11-18 20:29:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 20:29:12,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:12,564 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:12,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:12,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:12,769 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1267468051, now seen corresponding path program 18 times [2022-11-18 20:29:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:12,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656236650] [2022-11-18 20:29:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:12,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:15,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656236650] [2022-11-18 20:29:15,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656236650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105064715] [2022-11-18 20:29:15,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:29:15,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:15,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:15,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:15,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:29:15,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-18 20:29:15,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:15,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 20:29:15,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:18,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:22,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105064715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:22,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:22,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 42, 42] total 118 [2022-11-18 20:29:22,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778958683] [2022-11-18 20:29:22,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:22,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-18 20:29:22,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-18 20:29:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=12180, Unknown=0, NotChecked=0, Total=13806 [2022-11-18 20:29:22,254 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:32,197 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2022-11-18 20:29:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 20:29:32,197 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-18 20:29:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:32,198 INFO L225 Difference]: With dead ends: 197 [2022-11-18 20:29:32,198 INFO L226 Difference]: Without dead ends: 140 [2022-11-18 20:29:32,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6730 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=2952, Invalid=22170, Unknown=0, NotChecked=0, Total=25122 [2022-11-18 20:29:32,199 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 243 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:32,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 137 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 20:29:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-18 20:29:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-11-18 20:29:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 135 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2022-11-18 20:29:32,400 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 73 [2022-11-18 20:29:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:32,400 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2022-11-18 20:29:32,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2022-11-18 20:29:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:29:32,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:32,401 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:32,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:32,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 20:29:32,601 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:32,602 INFO L85 PathProgramCache]: Analyzing trace with hash -473444811, now seen corresponding path program 19 times [2022-11-18 20:29:32,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:32,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624396898] [2022-11-18 20:29:32,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:32,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624396898] [2022-11-18 20:29:33,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624396898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936256506] [2022-11-18 20:29:33,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:29:33,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:33,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:33,785 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:33,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:29:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:33,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 20:29:33,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:34,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:35,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936256506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:35,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:35,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2022-11-18 20:29:35,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487188633] [2022-11-18 20:29:35,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:35,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-18 20:29:35,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:35,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-18 20:29:35,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=4634, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 20:29:35,921 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:37,724 INFO L93 Difference]: Finished difference Result 194 states and 213 transitions. [2022-11-18 20:29:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 20:29:37,725 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-18 20:29:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:37,728 INFO L225 Difference]: With dead ends: 194 [2022-11-18 20:29:37,728 INFO L226 Difference]: Without dead ends: 192 [2022-11-18 20:29:37,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 94 SyntacticMatches, 17 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3941 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2199, Invalid=10011, Unknown=0, NotChecked=0, Total=12210 [2022-11-18 20:29:37,730 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 356 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:37,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 103 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:29:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-18 20:29:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 78. [2022-11-18 20:29:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-11-18 20:29:37,876 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-11-18 20:29:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:37,902 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-11-18 20:29:37,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-11-18 20:29:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-18 20:29:37,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:37,903 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:37,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:38,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 20:29:38,104 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash 283060809, now seen corresponding path program 20 times [2022-11-18 20:29:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:38,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203353704] [2022-11-18 20:29:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:38,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:40,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203353704] [2022-11-18 20:29:40,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203353704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270604411] [2022-11-18 20:29:40,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:40,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:40,757 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:40,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:29:40,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:40,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:40,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-18 20:29:40,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:43,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:48,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270604411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:48,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:48,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 42] total 119 [2022-11-18 20:29:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665734342] [2022-11-18 20:29:48,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-18 20:29:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:48,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-18 20:29:48,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=12172, Unknown=0, NotChecked=0, Total=14042 [2022-11-18 20:29:48,574 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:06,136 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-11-18 20:30:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-18 20:30:06,137 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-18 20:30:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:06,138 INFO L225 Difference]: With dead ends: 214 [2022-11-18 20:30:06,138 INFO L226 Difference]: Without dead ends: 154 [2022-11-18 20:30:06,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12268 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=5252, Invalid=34150, Unknown=0, NotChecked=0, Total=39402 [2022-11-18 20:30:06,142 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 536 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:06,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 500 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-18 20:30:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-18 20:30:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2022-11-18 20:30:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-11-18 20:30:06,362 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 77 [2022-11-18 20:30:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:06,362 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-11-18 20:30:06,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-11-18 20:30:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-18 20:30:06,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:06,364 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:06,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-18 20:30:06,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:30:06,577 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1899663213, now seen corresponding path program 21 times [2022-11-18 20:30:06,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:06,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090169620] [2022-11-18 20:30:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:06,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:09,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:09,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090169620] [2022-11-18 20:30:09,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090169620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:09,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015565457] [2022-11-18 20:30:09,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:09,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:09,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:09,321 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:09,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:30:09,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-18 20:30:09,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:30:09,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:13,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:18,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015565457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:18,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:18,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 46, 46] total 130 [2022-11-18 20:30:18,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864785588] [2022-11-18 20:30:18,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:18,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 20:30:18,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:18,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 20:30:18,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=14813, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 20:30:18,091 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:29,002 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-11-18 20:30:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 20:30:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-18 20:30:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:29,003 INFO L225 Difference]: With dead ends: 168 [2022-11-18 20:30:29,003 INFO L226 Difference]: Without dead ends: 105 [2022-11-18 20:30:29,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7998 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=3558, Invalid=26892, Unknown=0, NotChecked=0, Total=30450 [2022-11-18 20:30:29,005 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 289 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:29,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 121 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 20:30:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-18 20:30:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-11-18 20:30:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2022-11-18 20:30:29,176 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 81 [2022-11-18 20:30:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:29,177 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2022-11-18 20:30:29,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:29,177 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2022-11-18 20:30:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 20:30:29,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:29,178 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:29,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:30:29,384 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1093180597, now seen corresponding path program 22 times [2022-11-18 20:30:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350073397] [2022-11-18 20:30:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 171 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:30,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:30,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350073397] [2022-11-18 20:30:30,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350073397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:30,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594123857] [2022-11-18 20:30:30,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:30:30,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:30,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:30,556 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:30,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:30:30,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:30:30,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:30,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-18 20:30:30,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:31,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:32,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594123857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:32,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:32,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2022-11-18 20:30:32,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968392653] [2022-11-18 20:30:32,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:32,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-18 20:30:32,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-18 20:30:32,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1117, Invalid=5689, Unknown=0, NotChecked=0, Total=6806 [2022-11-18 20:30:32,841 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:34,954 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2022-11-18 20:30:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:30:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-18 20:30:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:34,956 INFO L225 Difference]: With dead ends: 165 [2022-11-18 20:30:34,957 INFO L226 Difference]: Without dead ends: 163 [2022-11-18 20:30:34,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 104 SyntacticMatches, 19 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2683, Invalid=12323, Unknown=0, NotChecked=0, Total=15006 [2022-11-18 20:30:34,958 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 242 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:34,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 135 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:30:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-18 20:30:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2022-11-18 20:30:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-11-18 20:30:35,151 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2022-11-18 20:30:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:35,151 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-11-18 20:30:35,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-11-18 20:30:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 20:30:35,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:35,153 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:35,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-18 20:30:35,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:30:35,358 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:35,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1789015095, now seen corresponding path program 23 times [2022-11-18 20:30:35,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:35,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565876372] [2022-11-18 20:30:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:35,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:37,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565876372] [2022-11-18 20:30:37,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565876372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668811897] [2022-11-18 20:30:37,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:30:37,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:37,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:37,828 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:37,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:30:37,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-18 20:30:37,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-18 20:30:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:39,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:44,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668811897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:44,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:44,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 46] total 111 [2022-11-18 20:30:44,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730745152] [2022-11-18 20:30:44,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:44,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-18 20:30:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-18 20:30:44,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1784, Invalid=10426, Unknown=0, NotChecked=0, Total=12210 [2022-11-18 20:30:44,449 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:03,216 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2022-11-18 20:31:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-18 20:31:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 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 85 [2022-11-18 20:31:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:03,217 INFO L225 Difference]: With dead ends: 236 [2022-11-18 20:31:03,218 INFO L226 Difference]: Without dead ends: 170 [2022-11-18 20:31:03,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10430 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=5397, Invalid=33609, Unknown=0, NotChecked=0, Total=39006 [2022-11-18 20:31:03,221 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 598 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 4499 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 5080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 4499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:03,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 531 Invalid, 5080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 4499 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-18 20:31:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-18 20:31:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2022-11-18 20:31:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2) internal successors, (132), 110 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2022-11-18 20:31:03,471 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 85 [2022-11-18 20:31:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:03,471 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2022-11-18 20:31:03,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2022-11-18 20:31:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 20:31:03,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:03,472 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:03,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:03,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:03,678 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1654831635, now seen corresponding path program 24 times [2022-11-18 20:31:03,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:03,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200591951] [2022-11-18 20:31:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:03,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:06,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:06,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200591951] [2022-11-18 20:31:06,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200591951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:06,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422324352] [2022-11-18 20:31:06,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:31:06,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:06,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:06,698 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:06,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:31:06,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-11-18 20:31:06,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:31:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:10,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:15,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422324352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:15,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:15,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 138 [2022-11-18 20:31:15,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878075125] [2022-11-18 20:31:15,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:15,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-11-18 20:31:15,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-11-18 20:31:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=16694, Unknown=0, NotChecked=0, Total=18906 [2022-11-18 20:31:15,961 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:30,432 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2022-11-18 20:31:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:31:30,433 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 0 states have call successors, (0), 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 89 [2022-11-18 20:31:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:30,434 INFO L225 Difference]: With dead ends: 184 [2022-11-18 20:31:30,434 INFO L226 Difference]: Without dead ends: 115 [2022-11-18 20:31:30,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8879 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=3979, Invalid=30431, Unknown=0, NotChecked=0, Total=34410 [2022-11-18 20:31:30,437 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 250 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2752 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 2752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:30,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 158 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 2752 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 20:31:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-18 20:31:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-11-18 20:31:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-11-18 20:31:30,678 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 89 [2022-11-18 20:31:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:30,678 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-11-18 20:31:30,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-11-18 20:31:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 20:31:30,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:30,679 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:30,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:30,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:31:30,880 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash -869430475, now seen corresponding path program 25 times [2022-11-18 20:31:30,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:30,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562363743] [2022-11-18 20:31:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 210 proven. 653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:32,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562363743] [2022-11-18 20:31:32,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562363743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:32,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53023752] [2022-11-18 20:31:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:31:32,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:32,241 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:32,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:31:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-18 20:31:32,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:33,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:34,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53023752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:34,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:34,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 91 [2022-11-18 20:31:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992668441] [2022-11-18 20:31:34,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:34,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-18 20:31:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:34,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-18 20:31:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=6852, Unknown=0, NotChecked=0, Total=8190 [2022-11-18 20:31:34,964 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:37,410 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2022-11-18 20:31:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 20:31:37,410 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-11-18 20:31:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:37,411 INFO L225 Difference]: With dead ends: 181 [2022-11-18 20:31:37,411 INFO L226 Difference]: Without dead ends: 179 [2022-11-18 20:31:37,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 114 SyntacticMatches, 21 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5961 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3215, Invalid=14875, Unknown=0, NotChecked=0, Total=18090 [2022-11-18 20:31:37,412 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 322 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:37,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 128 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:31:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-18 20:31:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 94. [2022-11-18 20:31:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-11-18 20:31:37,611 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2022-11-18 20:31:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:37,611 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-11-18 20:31:37,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-11-18 20:31:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-18 20:31:37,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:37,612 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:37,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:37,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:37,818 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:37,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1749306697, now seen corresponding path program 26 times [2022-11-18 20:31:37,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:37,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532788015] [2022-11-18 20:31:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:37,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:40,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:40,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532788015] [2022-11-18 20:31:40,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532788015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:40,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647824177] [2022-11-18 20:31:40,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:31:40,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:40,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:40,769 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:40,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:31:40,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:31:40,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 144 conjunts are in the unsatisfiable core [2022-11-18 20:31:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:44,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:51,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647824177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:51,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:51,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 50] total 143 [2022-11-18 20:31:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699150500] [2022-11-18 20:31:51,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:51,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-11-18 20:31:51,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-11-18 20:31:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2672, Invalid=17634, Unknown=0, NotChecked=0, Total=20306 [2022-11-18 20:31:51,675 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:19,006 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2022-11-18 20:32:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-18 20:32:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 0 states have call successors, (0), 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 93 [2022-11-18 20:32:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:19,009 INFO L225 Difference]: With dead ends: 258 [2022-11-18 20:32:19,010 INFO L226 Difference]: Without dead ends: 186 [2022-11-18 20:32:19,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17854 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=7494, Invalid=49388, Unknown=0, NotChecked=0, Total=56882 [2022-11-18 20:32:19,013 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 699 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 5750 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 6403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 5750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:19,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 684 Invalid, 6403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 5750 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-18 20:32:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-18 20:32:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 121. [2022-11-18 20:32:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2) internal successors, (144), 120 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-18 20:32:19,346 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 93 [2022-11-18 20:32:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:19,346 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-18 20:32:19,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:19,347 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-18 20:32:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 20:32:19,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:19,347 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:19,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:19,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:19,553 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 340008045, now seen corresponding path program 27 times [2022-11-18 20:32:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:19,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652931520] [2022-11-18 20:32:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:23,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:23,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652931520] [2022-11-18 20:32:23,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652931520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:23,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784926106] [2022-11-18 20:32:23,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:32:23,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:23,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:23,086 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:23,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:32:23,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-18 20:32:23,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:32:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 20:32:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:28,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:34,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784926106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:32:34,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:32:34,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 52] total 150 [2022-11-18 20:32:34,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067401501] [2022-11-18 20:32:34,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:32:34,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-11-18 20:32:34,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-11-18 20:32:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=19748, Unknown=0, NotChecked=0, Total=22350 [2022-11-18 20:32:34,980 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:51,958 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2022-11-18 20:32:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-18 20:32:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 0 states have call successors, (0), 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 97 [2022-11-18 20:32:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:51,960 INFO L225 Difference]: With dead ends: 200 [2022-11-18 20:32:51,960 INFO L226 Difference]: Without dead ends: 125 [2022-11-18 20:32:51,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10427 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=4704, Invalid=35898, Unknown=0, NotChecked=0, Total=40602 [2022-11-18 20:32:51,963 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 256 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:51,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 165 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3154 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-18 20:32:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-18 20:32:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2022-11-18 20:32:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2022-11-18 20:32:52,249 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 97 [2022-11-18 20:32:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:52,249 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2022-11-18 20:32:52,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2022-11-18 20:32:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 20:32:52,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:52,251 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:52,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:52,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 20:32:52,457 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1740727883, now seen corresponding path program 28 times [2022-11-18 20:32:52,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:52,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912810849] [2022-11-18 20:32:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:52,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 253 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:53,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:53,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912810849] [2022-11-18 20:32:53,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912810849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:53,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914878776] [2022-11-18 20:32:53,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:32:53,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:53,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:53,901 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:53,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 20:32:53,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:32:53,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:32:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 20:32:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:55,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:56,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914878776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:32:56,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:32:56,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-11-18 20:32:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769232255] [2022-11-18 20:32:56,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:32:56,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-18 20:32:56,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-18 20:32:56,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1579, Invalid=8123, Unknown=0, NotChecked=0, Total=9702 [2022-11-18 20:32:56,967 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:59,773 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2022-11-18 20:32:59,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:32:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 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 98 [2022-11-18 20:32:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:59,775 INFO L225 Difference]: With dead ends: 197 [2022-11-18 20:32:59,775 INFO L226 Difference]: Without dead ends: 195 [2022-11-18 20:32:59,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 124 SyntacticMatches, 23 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7127 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3795, Invalid=17667, Unknown=0, NotChecked=0, Total=21462 [2022-11-18 20:32:59,778 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 286 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:59,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 145 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:32:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-18 20:33:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 102. [2022-11-18 20:33:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-11-18 20:33:00,020 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2022-11-18 20:33:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:00,020 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-11-18 20:33:00,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-11-18 20:33:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:33:00,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:00,021 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:00,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:00,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-18 20:33:00,222 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash -584405303, now seen corresponding path program 29 times [2022-11-18 20:33:00,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:00,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235869147] [2022-11-18 20:33:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:00,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 715 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:03,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235869147] [2022-11-18 20:33:03,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235869147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346544816] [2022-11-18 20:33:03,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:33:03,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:03,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:03,490 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:03,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 20:33:03,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-18 20:33:03,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:33:03,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-18 20:33:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:06,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:12,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346544816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:33:12,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:33:12,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 54] total 131 [2022-11-18 20:33:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482354512] [2022-11-18 20:33:12,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:12,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-18 20:33:12,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-18 20:33:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2468, Invalid=14562, Unknown=0, NotChecked=0, Total=17030 [2022-11-18 20:33:12,200 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:38,617 INFO L93 Difference]: Finished difference Result 280 states and 308 transitions. [2022-11-18 20:33:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-18 20:33:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 0 states have call successors, (0), 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 101 [2022-11-18 20:33:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:38,618 INFO L225 Difference]: With dead ends: 280 [2022-11-18 20:33:38,618 INFO L226 Difference]: Without dead ends: 202 [2022-11-18 20:33:38,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14628 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=7463, Invalid=47059, Unknown=0, NotChecked=0, Total=54522 [2022-11-18 20:33:38,621 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 773 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 5792 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 6559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 5792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:38,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 709 Invalid, 6559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 5792 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-18 20:33:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-18 20:33:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2022-11-18 20:33:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2) internal successors, (156), 130 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2022-11-18 20:33:38,968 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 101 [2022-11-18 20:33:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:38,968 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2022-11-18 20:33:38,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2022-11-18 20:33:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-18 20:33:38,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:38,969 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:38,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:39,170 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2091445523, now seen corresponding path program 30 times [2022-11-18 20:33:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:39,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965546977] [2022-11-18 20:33:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 782 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:42,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:42,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965546977] [2022-11-18 20:33:42,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965546977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:42,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110920600] [2022-11-18 20:33:42,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:33:42,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:42,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:42,653 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:42,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 20:33:42,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-18 20:33:42,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:33:42,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 20:33:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:47,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:55,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110920600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:33:55,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:33:55,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 58, 58] total 166 [2022-11-18 20:33:55,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874590793] [2022-11-18 20:33:55,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:55,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-11-18 20:33:55,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-11-18 20:33:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3154, Invalid=24236, Unknown=0, NotChecked=0, Total=27390 [2022-11-18 20:33:55,387 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:15,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:15,562 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2022-11-18 20:34:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 20:34:15,563 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 0 states have call successors, (0), 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 105 [2022-11-18 20:34:15,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:15,563 INFO L225 Difference]: With dead ends: 216 [2022-11-18 20:34:15,564 INFO L226 Difference]: Without dead ends: 135 [2022-11-18 20:34:15,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13263 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=5667, Invalid=43839, Unknown=0, NotChecked=0, Total=49506 [2022-11-18 20:34:15,568 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 324 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 3289 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 3289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:15,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 156 Invalid, 3771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 3289 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 20:34:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-18 20:34:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-11-18 20:34:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 130 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2022-11-18 20:34:16,056 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 105 [2022-11-18 20:34:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:16,056 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2022-11-18 20:34:16,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2022-11-18 20:34:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-18 20:34:16,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:16,057 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:16,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:16,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:16,257 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1966880715, now seen corresponding path program 31 times [2022-11-18 20:34:16,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:16,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823200769] [2022-11-18 20:34:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:16,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 300 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:17,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:17,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823200769] [2022-11-18 20:34:17,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823200769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:17,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606883175] [2022-11-18 20:34:17,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:34:17,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:17,978 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:17,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 20:34:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-18 20:34:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:19,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:21,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606883175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:21,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:21,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-11-18 20:34:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807586162] [2022-11-18 20:34:21,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-18 20:34:21,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-18 20:34:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1840, Invalid=9502, Unknown=0, NotChecked=0, Total=11342 [2022-11-18 20:34:21,477 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:24,727 INFO L93 Difference]: Finished difference Result 213 states and 238 transitions. [2022-11-18 20:34:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-18 20:34:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 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 106 [2022-11-18 20:34:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:24,728 INFO L225 Difference]: With dead ends: 213 [2022-11-18 20:34:24,728 INFO L226 Difference]: Without dead ends: 211 [2022-11-18 20:34:24,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 134 SyntacticMatches, 25 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8397 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4423, Invalid=20699, Unknown=0, NotChecked=0, Total=25122 [2022-11-18 20:34:24,731 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 326 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:24,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 161 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:34:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-18 20:34:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 110. [2022-11-18 20:34:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-11-18 20:34:25,016 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2022-11-18 20:34:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:25,016 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-11-18 20:34:25,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-11-18 20:34:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-18 20:34:25,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:25,017 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:25,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-18 20:34:25,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:25,223 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash 900264009, now seen corresponding path program 32 times [2022-11-18 20:34:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:25,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141348877] [2022-11-18 20:34:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 852 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:29,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141348877] [2022-11-18 20:34:29,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141348877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078794738] [2022-11-18 20:34:29,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:34:29,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:29,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:29,013 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:29,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:34:29,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:34:29,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:34:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-18 20:34:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:31,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:38,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078794738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:38,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:38,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 138 [2022-11-18 20:34:38,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435373620] [2022-11-18 20:34:38,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:38,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-11-18 20:34:38,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-11-18 20:34:38,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2715, Invalid=16191, Unknown=0, NotChecked=0, Total=18906 [2022-11-18 20:34:38,597 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:05,339 INFO L93 Difference]: Finished difference Result 302 states and 332 transitions. [2022-11-18 20:35:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-18 20:35:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 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 109 [2022-11-18 20:35:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:05,340 INFO L225 Difference]: With dead ends: 302 [2022-11-18 20:35:05,340 INFO L226 Difference]: Without dead ends: 218 [2022-11-18 20:35:05,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16275 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=8324, Invalid=52932, Unknown=0, NotChecked=0, Total=61256 [2022-11-18 20:35:05,343 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 802 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 6827 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 7697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 6827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:05,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 846 Invalid, 7697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 6827 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-18 20:35:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-18 20:35:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 141. [2022-11-18 20:35:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2) internal successors, (168), 140 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2022-11-18 20:35:05,841 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 109 [2022-11-18 20:35:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:05,841 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2022-11-18 20:35:05,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2022-11-18 20:35:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 20:35:05,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:05,842 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:05,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:06,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:06,048 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash -369219219, now seen corresponding path program 33 times [2022-11-18 20:35:06,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:06,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085535012] [2022-11-18 20:35:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:06,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 925 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:10,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085535012] [2022-11-18 20:35:10,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085535012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323159052] [2022-11-18 20:35:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:35:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:10,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:10,102 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:10,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 20:35:10,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-18 20:35:10,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:35:10,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 20:35:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:15,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:23,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323159052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:23,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:23,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60, 60] total 174 [2022-11-18 20:35:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683951802] [2022-11-18 20:35:23,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:23,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-11-18 20:35:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:23,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-11-18 20:35:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3478, Invalid=26624, Unknown=0, NotChecked=0, Total=30102 [2022-11-18 20:35:23,682 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:45,603 INFO L93 Difference]: Finished difference Result 232 states and 260 transitions. [2022-11-18 20:35:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-18 20:35:45,603 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 0 states have call successors, (0), 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 113 [2022-11-18 20:35:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:45,604 INFO L225 Difference]: With dead ends: 232 [2022-11-18 20:35:45,604 INFO L226 Difference]: Without dead ends: 145 [2022-11-18 20:35:45,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14071 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=6260, Invalid=48262, Unknown=0, NotChecked=0, Total=54522 [2022-11-18 20:35:45,607 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 306 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 3638 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 4164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 3638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:45,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 171 Invalid, 4164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 3638 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 20:35:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-18 20:35:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2022-11-18 20:35:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2022-11-18 20:35:46,034 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 113 [2022-11-18 20:35:46,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:46,034 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2022-11-18 20:35:46,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2022-11-18 20:35:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-18 20:35:46,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:46,035 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:46,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:46,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 20:35:46,235 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -618326347, now seen corresponding path program 34 times [2022-11-18 20:35:46,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:46,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174806175] [2022-11-18 20:35:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:46,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 351 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:48,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:48,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174806175] [2022-11-18 20:35:48,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174806175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:48,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564028974] [2022-11-18 20:35:48,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:35:48,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:48,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:48,204 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:48,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-18 20:35:48,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:35:48,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:35:48,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-18 20:35:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:50,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:52,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564028974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:52,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:52,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2022-11-18 20:35:52,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025965925] [2022-11-18 20:35:52,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:52,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-11-18 20:35:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-11-18 20:35:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2121, Invalid=10989, Unknown=0, NotChecked=0, Total=13110 [2022-11-18 20:35:52,196 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:55,886 INFO L93 Difference]: Finished difference Result 229 states and 256 transitions. [2022-11-18 20:35:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-18 20:35:55,887 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 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 114 [2022-11-18 20:35:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:55,888 INFO L225 Difference]: With dead ends: 229 [2022-11-18 20:35:55,888 INFO L226 Difference]: Without dead ends: 227 [2022-11-18 20:35:55,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 144 SyntacticMatches, 27 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9771 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5099, Invalid=23971, Unknown=0, NotChecked=0, Total=29070 [2022-11-18 20:35:55,890 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 424 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:55,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 159 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:35:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-18 20:35:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 118. [2022-11-18 20:35:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-11-18 20:35:56,242 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2022-11-18 20:35:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:56,243 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-11-18 20:35:56,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-11-18 20:35:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 20:35:56,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:56,243 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:56,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:56,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 20:35:56,444 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:56,444 INFO L85 PathProgramCache]: Analyzing trace with hash 559354313, now seen corresponding path program 35 times [2022-11-18 20:35:56,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:56,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948649100] [2022-11-18 20:35:56,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:56,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 1001 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:00,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:00,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948649100] [2022-11-18 20:36:00,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948649100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:00,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604979740] [2022-11-18 20:36:00,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:36:00,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:00,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:00,895 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:00,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-18 20:36:01,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-11-18 20:36:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:01,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-18 20:36:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:04,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:12,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604979740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:12,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:12,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 62] total 151 [2022-11-18 20:36:12,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104096507] [2022-11-18 20:36:12,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:12,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-11-18 20:36:12,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-11-18 20:36:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3266, Invalid=19384, Unknown=0, NotChecked=0, Total=22650 [2022-11-18 20:36:12,102 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:43,387 INFO L93 Difference]: Finished difference Result 324 states and 356 transitions. [2022-11-18 20:36:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-18 20:36:43,387 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 0 states have call successors, (0), 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 117 [2022-11-18 20:36:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:43,388 INFO L225 Difference]: With dead ends: 324 [2022-11-18 20:36:43,388 INFO L226 Difference]: Without dead ends: 234 [2022-11-18 20:36:43,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19159 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=9735, Invalid=61821, Unknown=0, NotChecked=0, Total=71556 [2022-11-18 20:36:43,391 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 951 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 7529 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 8514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 7529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:43,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 950 Invalid, 8514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [985 Valid, 7529 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-18 20:36:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-18 20:36:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 151. [2022-11-18 20:36:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.2) internal successors, (180), 150 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) [2022-11-18 20:36:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2022-11-18 20:36:43,922 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 117 [2022-11-18 20:36:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:43,922 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2022-11-18 20:36:43,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2022-11-18 20:36:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-18 20:36:43,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:43,924 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:43,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:44,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 20:36:44,125 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:44,126 INFO L85 PathProgramCache]: Analyzing trace with hash 430006253, now seen corresponding path program 36 times [2022-11-18 20:36:44,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:44,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441144350] [2022-11-18 20:36:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:44,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1080 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:48,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441144350] [2022-11-18 20:36:48,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441144350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:48,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484983869] [2022-11-18 20:36:48,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:36:48,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:48,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:48,765 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:48,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-18 20:36:48,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-11-18 20:36:48,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-18 20:36:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:55,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:05,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484983869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:05,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:05,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 66, 66] total 190 [2022-11-18 20:37:05,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534963490] [2022-11-18 20:37:05,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:05,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-18 20:37:05,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-18 20:37:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4107, Invalid=31803, Unknown=0, NotChecked=0, Total=35910 [2022-11-18 20:37:05,112 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:32,632 INFO L93 Difference]: Finished difference Result 248 states and 278 transitions. [2022-11-18 20:37:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 20:37:32,633 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 0 states have call successors, (0), 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 121 [2022-11-18 20:37:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:32,634 INFO L225 Difference]: With dead ends: 248 [2022-11-18 20:37:32,634 INFO L226 Difference]: Without dead ends: 155 [2022-11-18 20:37:32,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17194 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=7466, Invalid=57814, Unknown=0, NotChecked=0, Total=65280 [2022-11-18 20:37:32,637 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 411 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 3751 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 4350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 3751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:32,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 159 Invalid, 4350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 3751 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 20:37:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-18 20:37:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-11-18 20:37:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2022-11-18 20:37:33,335 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 121 [2022-11-18 20:37:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:33,336 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2022-11-18 20:37:33,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2022-11-18 20:37:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-18 20:37:33,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:33,337 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:33,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:33,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:33,543 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1832221387, now seen corresponding path program 37 times [2022-11-18 20:37:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:33,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904953364] [2022-11-18 20:37:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:33,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 406 proven. 1249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:35,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:35,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904953364] [2022-11-18 20:37:35,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904953364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:35,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623929027] [2022-11-18 20:37:35,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:37:35,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:35,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:35,824 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:35,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-18 20:37:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:35,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-18 20:37:35,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:37,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:40,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623929027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:40,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:40,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 123 [2022-11-18 20:37:40,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830505224] [2022-11-18 20:37:40,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:40,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-18 20:37:40,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-18 20:37:40,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2422, Invalid=12584, Unknown=0, NotChecked=0, Total=15006 [2022-11-18 20:37:40,372 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 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) [2022-11-18 20:37:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:44,554 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2022-11-18 20:37:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-18 20:37:44,554 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 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 122 [2022-11-18 20:37:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:44,555 INFO L225 Difference]: With dead ends: 245 [2022-11-18 20:37:44,555 INFO L226 Difference]: Without dead ends: 243 [2022-11-18 20:37:44,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 154 SyntacticMatches, 29 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11249 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5823, Invalid=27483, Unknown=0, NotChecked=0, Total=33306 [2022-11-18 20:37:44,557 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 600 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:44,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 162 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:37:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-18 20:37:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 126. [2022-11-18 20:37:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-11-18 20:37:44,941 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2022-11-18 20:37:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:44,942 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-11-18 20:37:44,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 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) [2022-11-18 20:37:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-11-18 20:37:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-18 20:37:44,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:44,943 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:44,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:45,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-18 20:37:45,143 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849993, now seen corresponding path program 38 times [2022-11-18 20:37:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:45,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451486759] [2022-11-18 20:37:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1162 proven. 579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:49,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:49,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451486759] [2022-11-18 20:37:49,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451486759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:49,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293179907] [2022-11-18 20:37:49,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:37:49,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:49,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:49,981 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:49,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-18 20:37:50,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:37:50,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-18 20:37:50,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:56,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:06,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293179907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:06,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:06,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 66] total 191 [2022-11-18 20:38:06,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620655347] [2022-11-18 20:38:06,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:06,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-11-18 20:38:06,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-11-18 20:38:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4708, Invalid=31582, Unknown=0, NotChecked=0, Total=36290 [2022-11-18 20:38:06,778 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:51,393 INFO L93 Difference]: Finished difference Result 346 states and 380 transitions. [2022-11-18 20:38:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-11-18 20:38:51,393 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 0 states have call successors, (0), 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 125 [2022-11-18 20:38:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:51,395 INFO L225 Difference]: With dead ends: 346 [2022-11-18 20:38:51,395 INFO L226 Difference]: Without dead ends: 250 [2022-11-18 20:38:51,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32146 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=13178, Invalid=88264, Unknown=0, NotChecked=0, Total=101442 [2022-11-18 20:38:51,401 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1087 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 9245 mSolverCounterSat, 1126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 10371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 9245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:51,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1087 Valid, 1136 Invalid, 10371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1126 Valid, 9245 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-18 20:38:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-18 20:38:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 161. [2022-11-18 20:38:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.2) internal successors, (192), 160 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2022-11-18 20:38:52,155 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 125 [2022-11-18 20:38:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:52,155 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2022-11-18 20:38:52,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2022-11-18 20:38:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-18 20:38:52,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:52,157 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:52,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:52,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:52,359 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:38:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash 900249197, now seen corresponding path program 39 times [2022-11-18 20:38:52,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:52,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036116649] [2022-11-18 20:38:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:52,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1247 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:57,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036116649] [2022-11-18 20:38:57,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036116649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135820252] [2022-11-18 20:38:57,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:38:57,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:57,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:57,583 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:57,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-18 20:38:57,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-11-18 20:38:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:57,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-18 20:38:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:05,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:16,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135820252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:16,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:16,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 70, 70] total 202 [2022-11-18 20:39:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313916667] [2022-11-18 20:39:16,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:16,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-11-18 20:39:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-11-18 20:39:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4633, Invalid=35969, Unknown=0, NotChecked=0, Total=40602 [2022-11-18 20:39:16,410 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:48,199 INFO L93 Difference]: Finished difference Result 264 states and 296 transitions. [2022-11-18 20:39:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-18 20:39:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 0 states have call successors, (0), 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 129 [2022-11-18 20:39:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:48,200 INFO L225 Difference]: With dead ends: 264 [2022-11-18 20:39:48,200 INFO L226 Difference]: Without dead ends: 165 [2022-11-18 20:39:48,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19314 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=8310, Invalid=64860, Unknown=0, NotChecked=0, Total=73170 [2022-11-18 20:39:48,204 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 400 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 5268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:48,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 218 Invalid, 6003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-18 20:39:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-18 20:39:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-11-18 20:39:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.19375) internal successors, (191), 160 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) [2022-11-18 20:39:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2022-11-18 20:39:48,829 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 129 [2022-11-18 20:39:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:48,830 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2022-11-18 20:39:48,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:48,830 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2022-11-18 20:39:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-18 20:39:48,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:48,830 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:48,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:49,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:49,031 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash 219943861, now seen corresponding path program 40 times [2022-11-18 20:39:49,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:49,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692984565] [2022-11-18 20:39:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:49,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 465 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:51,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692984565] [2022-11-18 20:39:51,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692984565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:51,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339364333] [2022-11-18 20:39:51,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:39:51,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:51,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:51,588 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:51,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-18 20:39:51,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:39:51,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:51,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-18 20:39:51,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:53,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:56,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339364333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:56,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:56,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2022-11-18 20:39:56,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144420691] [2022-11-18 20:39:56,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:56,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-18 20:39:56,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-18 20:39:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2743, Invalid=14287, Unknown=0, NotChecked=0, Total=17030 [2022-11-18 20:39:56,749 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:01,499 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2022-11-18 20:40:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-18 20:40:01,500 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 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 130 [2022-11-18 20:40:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:01,501 INFO L225 Difference]: With dead ends: 261 [2022-11-18 20:40:01,501 INFO L226 Difference]: Without dead ends: 259 [2022-11-18 20:40:01,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 164 SyntacticMatches, 31 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12831 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=6595, Invalid=31235, Unknown=0, NotChecked=0, Total=37830 [2022-11-18 20:40:01,503 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 478 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:01,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 173 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:40:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-18 20:40:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 134. [2022-11-18 20:40:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-11-18 20:40:01,955 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2022-11-18 20:40:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:01,956 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-11-18 20:40:01,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-11-18 20:40:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-18 20:40:01,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:01,957 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:01,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-18 20:40:02,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:02,157 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:40:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1767705399, now seen corresponding path program 41 times [2022-11-18 20:40:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:40:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86407886] [2022-11-18 20:40:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:40:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1335 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:07,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:07,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86407886] [2022-11-18 20:40:07,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86407886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:07,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583894511] [2022-11-18 20:40:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:40:07,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:07,661 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:40:07,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0f60a3-1768-48a6-8f6e-e7c09ef374f3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-18 20:40:07,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-11-18 20:40:07,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:40:07,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 142 conjunts are in the unsatisfiable core [2022-11-18 20:40:07,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:11,778 INFO L328 TraceCheckSpWp]: Computing backward predicates...