./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a --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 d9dd329404607c04c3b8409033c911abc5eb1af40daa0f8673d76c8f1e85e1ae --- 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-b5237d8 [2022-11-21 09:05:22,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:05:22,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:05:22,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:05:22,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:05:22,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:05:22,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:05:22,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:05:22,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:05:22,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:05:22,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:05:22,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:05:22,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:05:22,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:05:22,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:05:22,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:05:22,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:05:22,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:05:22,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:05:22,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:05:22,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:05:22,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:05:22,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:05:22,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:05:22,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:05:22,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:05:22,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:05:22,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:05:22,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:05:22,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:05:22,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:05:22,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:05:22,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:05:22,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:05:22,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:05:22,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:05:22,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:05:22,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:05:22,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:05:22,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:05:22,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:05:22,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 09:05:22,214 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:05:22,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:05:22,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:05:22,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:05:22,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:05:22,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:05:22,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:05:22,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:05:22,217 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:05:22,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:05:22,218 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:05:22,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:05:22,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:05:22,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:05:22,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 09:05:22,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:05:22,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 09:05:22,220 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:05:22,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:05:22,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:05:22,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 09:05:22,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:05:22,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:05:22,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:05:22,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:05:22,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:05:22,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:05:22,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 09:05:22,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:05:22,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:05:22,223 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 09:05:22,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 09:05:22,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 09:05:22,224 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_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9dd329404607c04c3b8409033c911abc5eb1af40daa0f8673d76c8f1e85e1ae [2022-11-21 09:05:22,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:05:22,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:05:22,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:05:22,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:05:22,510 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:05:22,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c [2022-11-21 09:05:25,903 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:05:26,186 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:05:26,187 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c [2022-11-21 09:05:26,206 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/data/cc0e2538d/cb2f356aed3340c0a9a5363bc8b1b3e4/FLAG5a4a5cfbc [2022-11-21 09:05:26,227 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/data/cc0e2538d/cb2f356aed3340c0a9a5363bc8b1b3e4 [2022-11-21 09:05:26,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:05:26,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:05:26,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:05:26,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:05:26,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:05:26,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d09ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26, skipping insertion in model container [2022-11-21 09:05:26,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:05:26,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:05:26,528 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c[911,924] [2022-11-21 09:05:26,619 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c[8416,8429] [2022-11-21 09:05:26,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:05:26,708 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:05:26,725 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c[911,924] [2022-11-21 09:05:26,767 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-2.c[8416,8429] [2022-11-21 09:05:26,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:05:26,820 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:05:26,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26 WrapperNode [2022-11-21 09:05:26,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:05:26,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:05:26,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:05:26,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:05:26,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,881 INFO L138 Inliner]: procedures = 59, calls = 68, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 503 [2022-11-21 09:05:26,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:05:26,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:05:26,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:05:26,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:05:26,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,951 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:05:26,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:05:26,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:05:26,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:05:26,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (1/1) ... [2022-11-21 09:05:26,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:05:26,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:27,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:05:27,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:05:27,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:05:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-21 09:05:27,060 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-21 09:05:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-21 09:05:27,060 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-21 09:05:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-21 09:05:27,061 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-21 09:05:27,061 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-21 09:05:27,061 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-21 09:05:27,061 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-21 09:05:27,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-21 09:05:27,061 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-21 09:05:27,062 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-21 09:05:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-21 09:05:27,062 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-21 09:05:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-21 09:05:27,062 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-21 09:05:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-21 09:05:27,063 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-21 09:05:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-21 09:05:27,063 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-21 09:05:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-21 09:05:27,063 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-21 09:05:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 09:05:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-21 09:05:27,064 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-21 09:05:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-21 09:05:27,064 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-21 09:05:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:05:27,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:05:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-21 09:05:27,065 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-21 09:05:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-21 09:05:27,065 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-21 09:05:27,190 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:05:27,193 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:05:27,871 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-21 09:05:27,872 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-21 09:05:27,943 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:05:27,955 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:05:27,955 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-21 09:05:27,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:27 BoogieIcfgContainer [2022-11-21 09:05:27,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:05:27,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:05:27,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:05:27,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:05:27,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:05:26" (1/3) ... [2022-11-21 09:05:27,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc0c22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:27, skipping insertion in model container [2022-11-21 09:05:27,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:26" (2/3) ... [2022-11-21 09:05:27,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc0c22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:27, skipping insertion in model container [2022-11-21 09:05:27,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:27" (3/3) ... [2022-11-21 09:05:27,969 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.02.cil-2.c [2022-11-21 09:05:27,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:05:27,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 09:05:28,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:05:28,073 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;@521cf644, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:05:28,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 09:05:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 257 states, 205 states have (on average 1.5658536585365854) internal successors, (321), 213 states have internal predecessors, (321), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-21 09:05:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 09:05:28,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:28,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:28,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1020803089, now seen corresponding path program 1 times [2022-11-21 09:05:28,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:28,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971116597] [2022-11-21 09:05:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:28,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:05:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:05:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 09:05:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 09:05:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 09:05:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:28,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:28,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971116597] [2022-11-21 09:05:28,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971116597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:28,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:28,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 09:05:28,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352406004] [2022-11-21 09:05:28,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:28,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 09:05:28,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 09:05:28,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:05:28,935 INFO L87 Difference]: Start difference. First operand has 257 states, 205 states have (on average 1.5658536585365854) internal successors, (321), 213 states have internal predecessors, (321), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:05:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:30,372 INFO L93 Difference]: Finished difference Result 646 states and 985 transitions. [2022-11-21 09:05:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:30,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 09:05:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:30,391 INFO L225 Difference]: With dead ends: 646 [2022-11-21 09:05:30,391 INFO L226 Difference]: Without dead ends: 397 [2022-11-21 09:05:30,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-21 09:05:30,401 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 691 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:30,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 1109 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 09:05:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-21 09:05:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 358. [2022-11-21 09:05:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 287 states have (on average 1.456445993031359) internal successors, (418), 294 states have internal predecessors, (418), 47 states have call successors, (47), 22 states have call predecessors, (47), 22 states have return successors, (48), 44 states have call predecessors, (48), 43 states have call successors, (48) [2022-11-21 09:05:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 513 transitions. [2022-11-21 09:05:30,506 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 513 transitions. Word has length 65 [2022-11-21 09:05:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:30,507 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 513 transitions. [2022-11-21 09:05:30,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:05:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 513 transitions. [2022-11-21 09:05:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 09:05:30,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:30,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 09:05:30,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1595275567, now seen corresponding path program 1 times [2022-11-21 09:05:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227897410] [2022-11-21 09:05:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:30,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:05:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:05:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 09:05:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 09:05:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 09:05:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:30,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227897410] [2022-11-21 09:05:30,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227897410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:30,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:30,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 09:05:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001549386] [2022-11-21 09:05:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:30,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 09:05:30,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:30,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 09:05:30,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:05:30,858 INFO L87 Difference]: Start difference. First operand 358 states and 513 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-21 09:05:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:33,597 INFO L93 Difference]: Finished difference Result 1391 states and 1973 transitions. [2022-11-21 09:05:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 09:05:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2022-11-21 09:05:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:33,607 INFO L225 Difference]: With dead ends: 1391 [2022-11-21 09:05:33,607 INFO L226 Difference]: Without dead ends: 1170 [2022-11-21 09:05:33,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 09:05:33,612 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 2173 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2193 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:33,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2193 Valid, 1800 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 09:05:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-21 09:05:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1031. [2022-11-21 09:05:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 830 states have (on average 1.393975903614458) internal successors, (1157), 845 states have internal predecessors, (1157), 118 states have call successors, (118), 75 states have call predecessors, (118), 81 states have return successors, (128), 112 states have call predecessors, (128), 114 states have call successors, (128) [2022-11-21 09:05:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1403 transitions. [2022-11-21 09:05:33,820 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1403 transitions. Word has length 65 [2022-11-21 09:05:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:33,821 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1403 transitions. [2022-11-21 09:05:33,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-21 09:05:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1403 transitions. [2022-11-21 09:05:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-21 09:05:33,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:33,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:33,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 09:05:33,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash -306777911, now seen corresponding path program 1 times [2022-11-21 09:05:33,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:33,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775919115] [2022-11-21 09:05:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:33,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:33,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:33,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:33,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:05:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:34,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:05:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:34,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 09:05:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:34,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-21 09:05:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-21 09:05:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:34,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:34,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775919115] [2022-11-21 09:05:34,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775919115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:34,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:34,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 09:05:34,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989537641] [2022-11-21 09:05:34,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:34,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 09:05:34,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 09:05:34,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 09:05:34,096 INFO L87 Difference]: Start difference. First operand 1031 states and 1403 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 09:05:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:35,315 INFO L93 Difference]: Finished difference Result 2057 states and 2797 transitions. [2022-11-21 09:05:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 09:05:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-11-21 09:05:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:35,323 INFO L225 Difference]: With dead ends: 2057 [2022-11-21 09:05:35,323 INFO L226 Difference]: Without dead ends: 1169 [2022-11-21 09:05:35,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 09:05:35,327 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 403 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:35,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1314 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 09:05:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-11-21 09:05:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1061. [2022-11-21 09:05:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 854 states have (on average 1.379391100702576) internal successors, (1178), 869 states have internal predecessors, (1178), 118 states have call successors, (118), 75 states have call predecessors, (118), 87 states have return successors, (134), 118 states have call predecessors, (134), 114 states have call successors, (134) [2022-11-21 09:05:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1430 transitions. [2022-11-21 09:05:35,435 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1430 transitions. Word has length 66 [2022-11-21 09:05:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:35,435 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1430 transitions. [2022-11-21 09:05:35,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 09:05:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1430 transitions. [2022-11-21 09:05:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-21 09:05:35,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:35,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:35,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 09:05:35,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1336137209, now seen corresponding path program 1 times [2022-11-21 09:05:35,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:35,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371557309] [2022-11-21 09:05:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:05:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:05:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 09:05:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-21 09:05:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-21 09:05:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:35,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:35,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371557309] [2022-11-21 09:05:35,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371557309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:35,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:35,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 09:05:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584063159] [2022-11-21 09:05:35,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:35,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 09:05:35,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:35,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 09:05:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:05:35,665 INFO L87 Difference]: Start difference. First operand 1061 states and 1430 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 09:05:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:38,377 INFO L93 Difference]: Finished difference Result 3399 states and 4617 transitions. [2022-11-21 09:05:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 09:05:38,381 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2022-11-21 09:05:38,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:38,388 INFO L225 Difference]: With dead ends: 3399 [2022-11-21 09:05:38,388 INFO L226 Difference]: Without dead ends: 1304 [2022-11-21 09:05:38,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 09:05:38,395 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 2239 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2259 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:38,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2259 Valid, 1829 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 09:05:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2022-11-21 09:05:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1149. [2022-11-21 09:05:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 907 states have (on average 1.3395810363836824) internal successors, (1215), 922 states have internal predecessors, (1215), 138 states have call successors, (138), 89 states have call predecessors, (138), 102 states have return successors, (155), 139 states have call predecessors, (155), 134 states have call successors, (155) [2022-11-21 09:05:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1508 transitions. [2022-11-21 09:05:38,513 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1508 transitions. Word has length 66 [2022-11-21 09:05:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:38,513 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1508 transitions. [2022-11-21 09:05:38,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 09:05:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1508 transitions. [2022-11-21 09:05:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 09:05:38,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:38,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:38,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 09:05:38,516 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1682176981, now seen corresponding path program 1 times [2022-11-21 09:05:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:38,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96715441] [2022-11-21 09:05:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:38,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:05:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:05:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:05:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:38,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:38,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96715441] [2022-11-21 09:05:38,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96715441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:38,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:38,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 09:05:38,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161964477] [2022-11-21 09:05:38,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:38,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 09:05:38,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:38,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 09:05:38,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:05:38,624 INFO L87 Difference]: Start difference. First operand 1149 states and 1508 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:39,789 INFO L93 Difference]: Finished difference Result 1459 states and 1979 transitions. [2022-11-21 09:05:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 09:05:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-21 09:05:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:39,796 INFO L225 Difference]: With dead ends: 1459 [2022-11-21 09:05:39,797 INFO L226 Difference]: Without dead ends: 1335 [2022-11-21 09:05:39,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-21 09:05:39,799 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 678 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:39,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 760 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 09:05:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-11-21 09:05:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1270. [2022-11-21 09:05:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1010 states have (on average 1.3574257425742575) internal successors, (1371), 1026 states have internal predecessors, (1371), 149 states have call successors, (149), 95 states have call predecessors, (149), 109 states have return successors, (169), 150 states have call predecessors, (169), 145 states have call successors, (169) [2022-11-21 09:05:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1689 transitions. [2022-11-21 09:05:39,946 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1689 transitions. Word has length 69 [2022-11-21 09:05:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:39,947 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 1689 transitions. [2022-11-21 09:05:39,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1689 transitions. [2022-11-21 09:05:39,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 09:05:39,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:39,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:39,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 09:05:39,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1579462617, now seen corresponding path program 1 times [2022-11-21 09:05:39,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:39,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138642249] [2022-11-21 09:05:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:39,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:40,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:40,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:40,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:05:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:40,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:05:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:05:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:40,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138642249] [2022-11-21 09:05:40,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138642249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:40,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:40,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 09:05:40,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309154178] [2022-11-21 09:05:40,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:40,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:05:40,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:05:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:40,146 INFO L87 Difference]: Start difference. First operand 1270 states and 1689 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:41,734 INFO L93 Difference]: Finished difference Result 1732 states and 2383 transitions. [2022-11-21 09:05:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-21 09:05:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:41,752 INFO L225 Difference]: With dead ends: 1732 [2022-11-21 09:05:41,752 INFO L226 Difference]: Without dead ends: 1487 [2022-11-21 09:05:41,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 09:05:41,758 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 702 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:41,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 961 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 09:05:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-11-21 09:05:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1384. [2022-11-21 09:05:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1106 states have (on average 1.367992766726944) internal successors, (1513), 1123 states have internal predecessors, (1513), 160 states have call successors, (160), 101 states have call predecessors, (160), 116 states have return successors, (182), 162 states have call predecessors, (182), 156 states have call successors, (182) [2022-11-21 09:05:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1855 transitions. [2022-11-21 09:05:41,931 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1855 transitions. Word has length 69 [2022-11-21 09:05:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:41,932 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1855 transitions. [2022-11-21 09:05:41,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1855 transitions. [2022-11-21 09:05:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 09:05:41,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:41,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:41,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 09:05:41,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash -192677207, now seen corresponding path program 1 times [2022-11-21 09:05:41,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:41,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926179561] [2022-11-21 09:05:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:41,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:41,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:42,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:42,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:05:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:42,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:05:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:42,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:05:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:42,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:42,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926179561] [2022-11-21 09:05:42,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926179561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:42,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:42,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 09:05:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600535603] [2022-11-21 09:05:42,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:42,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:05:42,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:05:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:42,089 INFO L87 Difference]: Start difference. First operand 1384 states and 1855 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:43,065 INFO L93 Difference]: Finished difference Result 1842 states and 2549 transitions. [2022-11-21 09:05:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:05:43,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-21 09:05:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:43,075 INFO L225 Difference]: With dead ends: 1842 [2022-11-21 09:05:43,075 INFO L226 Difference]: Without dead ends: 1483 [2022-11-21 09:05:43,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 09:05:43,082 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 684 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:43,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 630 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 09:05:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2022-11-21 09:05:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1384. [2022-11-21 09:05:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1106 states have (on average 1.3652802893309222) internal successors, (1510), 1123 states have internal predecessors, (1510), 160 states have call successors, (160), 101 states have call predecessors, (160), 116 states have return successors, (182), 162 states have call predecessors, (182), 156 states have call successors, (182) [2022-11-21 09:05:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1852 transitions. [2022-11-21 09:05:43,260 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1852 transitions. Word has length 69 [2022-11-21 09:05:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:43,261 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1852 transitions. [2022-11-21 09:05:43,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1852 transitions. [2022-11-21 09:05:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 09:05:43,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:43,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:43,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 09:05:43,270 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:43,271 INFO L85 PathProgramCache]: Analyzing trace with hash 251223467, now seen corresponding path program 1 times [2022-11-21 09:05:43,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:43,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499851751] [2022-11-21 09:05:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:43,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:05:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:05:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:05:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499851751] [2022-11-21 09:05:43,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499851751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:43,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:43,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 09:05:43,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212000762] [2022-11-21 09:05:43,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:05:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:05:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:43,419 INFO L87 Difference]: Start difference. First operand 1384 states and 1852 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:45,139 INFO L93 Difference]: Finished difference Result 2178 states and 3027 transitions. [2022-11-21 09:05:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 09:05:45,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-21 09:05:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:45,155 INFO L225 Difference]: With dead ends: 2178 [2022-11-21 09:05:45,155 INFO L226 Difference]: Without dead ends: 1819 [2022-11-21 09:05:45,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-21 09:05:45,159 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 733 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:45,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 1205 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 09:05:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2022-11-21 09:05:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1593. [2022-11-21 09:05:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1281 states have (on average 1.3762685402029664) internal successors, (1763), 1300 states have internal predecessors, (1763), 180 states have call successors, (180), 113 states have call predecessors, (180), 130 states have return successors, (210), 184 states have call predecessors, (210), 176 states have call successors, (210) [2022-11-21 09:05:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2153 transitions. [2022-11-21 09:05:45,399 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2153 transitions. Word has length 69 [2022-11-21 09:05:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:45,400 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 2153 transitions. [2022-11-21 09:05:45,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2153 transitions. [2022-11-21 09:05:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 09:05:45,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:45,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:45,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 09:05:45,404 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1789563497, now seen corresponding path program 1 times [2022-11-21 09:05:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:45,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720460626] [2022-11-21 09:05:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:45,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:45,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:45,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:45,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:05:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:45,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:05:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:45,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:05:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:45,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720460626] [2022-11-21 09:05:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720460626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:45,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:45,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 09:05:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976885894] [2022-11-21 09:05:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:45,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:05:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:05:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:45,561 INFO L87 Difference]: Start difference. First operand 1593 states and 2153 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:47,306 INFO L93 Difference]: Finished difference Result 2881 states and 4034 transitions. [2022-11-21 09:05:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 09:05:47,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-21 09:05:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:47,348 INFO L225 Difference]: With dead ends: 2881 [2022-11-21 09:05:47,348 INFO L226 Difference]: Without dead ends: 2313 [2022-11-21 09:05:47,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-21 09:05:47,353 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 672 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:47,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 1209 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 09:05:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-11-21 09:05:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2024. [2022-11-21 09:05:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 1646 states have (on average 1.3955042527339003) internal successors, (2297), 1669 states have internal predecessors, (2297), 218 states have call successors, (218), 137 states have call predecessors, (218), 158 states have return successors, (270), 226 states have call predecessors, (270), 214 states have call successors, (270) [2022-11-21 09:05:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2785 transitions. [2022-11-21 09:05:47,623 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2785 transitions. Word has length 69 [2022-11-21 09:05:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:47,623 INFO L495 AbstractCegarLoop]: Abstraction has 2024 states and 2785 transitions. [2022-11-21 09:05:47,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2785 transitions. [2022-11-21 09:05:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 09:05:47,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:47,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:47,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 09:05:47,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash -239022613, now seen corresponding path program 1 times [2022-11-21 09:05:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:47,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839026693] [2022-11-21 09:05:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:47,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:05:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:47,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:05:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:47,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:05:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:47,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:47,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839026693] [2022-11-21 09:05:47,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839026693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:47,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:47,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 09:05:47,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247129916] [2022-11-21 09:05:47,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:47,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:05:47,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:05:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:47,800 INFO L87 Difference]: Start difference. First operand 2024 states and 2785 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:49,300 INFO L93 Difference]: Finished difference Result 3560 states and 5064 transitions. [2022-11-21 09:05:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 09:05:49,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-21 09:05:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:49,332 INFO L225 Difference]: With dead ends: 3560 [2022-11-21 09:05:49,333 INFO L226 Difference]: Without dead ends: 2562 [2022-11-21 09:05:49,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:49,337 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 382 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:49,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1061 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 09:05:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2022-11-21 09:05:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2051. [2022-11-21 09:05:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 1673 states have (on average 1.389121338912134) internal successors, (2324), 1696 states have internal predecessors, (2324), 218 states have call successors, (218), 137 states have call predecessors, (218), 158 states have return successors, (270), 226 states have call predecessors, (270), 214 states have call successors, (270) [2022-11-21 09:05:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 2812 transitions. [2022-11-21 09:05:49,690 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 2812 transitions. Word has length 69 [2022-11-21 09:05:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:49,690 INFO L495 AbstractCegarLoop]: Abstraction has 2051 states and 2812 transitions. [2022-11-21 09:05:49,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 2812 transitions. [2022-11-21 09:05:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 09:05:49,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:49,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 09:05:49,694 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash 9123881, now seen corresponding path program 1 times [2022-11-21 09:05:49,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:49,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842490417] [2022-11-21 09:05:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:49,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:49,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:49,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:05:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:49,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:05:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:49,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:05:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:49,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:49,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842490417] [2022-11-21 09:05:49,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842490417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:49,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:49,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 09:05:49,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207454826] [2022-11-21 09:05:49,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:49,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:05:49,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:05:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:49,876 INFO L87 Difference]: Start difference. First operand 2051 states and 2812 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:52,335 INFO L93 Difference]: Finished difference Result 5545 states and 8068 transitions. [2022-11-21 09:05:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 09:05:52,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-21 09:05:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:52,363 INFO L225 Difference]: With dead ends: 5545 [2022-11-21 09:05:52,363 INFO L226 Difference]: Without dead ends: 4520 [2022-11-21 09:05:52,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-11-21 09:05:52,371 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 1492 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:52,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 991 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 09:05:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-11-21 09:05:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3969. [2022-11-21 09:05:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3269 states have (on average 1.4028754970939126) internal successors, (4586), 3323 states have internal predecessors, (4586), 410 states have call successors, (410), 251 states have call predecessors, (410), 288 states have return successors, (579), 403 states have call predecessors, (579), 406 states have call successors, (579) [2022-11-21 09:05:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 5575 transitions. [2022-11-21 09:05:53,002 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 5575 transitions. Word has length 69 [2022-11-21 09:05:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:53,002 INFO L495 AbstractCegarLoop]: Abstraction has 3969 states and 5575 transitions. [2022-11-21 09:05:53,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:05:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 5575 transitions. [2022-11-21 09:05:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-21 09:05:53,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:53,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:53,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 09:05:53,009 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:53,010 INFO L85 PathProgramCache]: Analyzing trace with hash -411543486, now seen corresponding path program 1 times [2022-11-21 09:05:53,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:53,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379136169] [2022-11-21 09:05:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:53,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:05:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:05:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 09:05:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 09:05:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-21 09:05:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-21 09:05:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 09:05:53,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379136169] [2022-11-21 09:05:53,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379136169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:53,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:53,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 09:05:53,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161308182] [2022-11-21 09:05:53,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:53,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 09:05:53,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 09:05:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 09:05:53,214 INFO L87 Difference]: Start difference. First operand 3969 states and 5575 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 09:05:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:54,675 INFO L93 Difference]: Finished difference Result 5146 states and 7126 transitions. [2022-11-21 09:05:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 09:05:54,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2022-11-21 09:05:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:54,696 INFO L225 Difference]: With dead ends: 5146 [2022-11-21 09:05:54,696 INFO L226 Difference]: Without dead ends: 4140 [2022-11-21 09:05:54,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-21 09:05:54,702 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 266 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:54,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1422 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 09:05:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2022-11-21 09:05:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 4009. [2022-11-21 09:05:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3301 states have (on average 1.3980611935777036) internal successors, (4615), 3355 states have internal predecessors, (4615), 410 states have call successors, (410), 251 states have call predecessors, (410), 296 states have return successors, (587), 411 states have call predecessors, (587), 406 states have call successors, (587) [2022-11-21 09:05:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 5612 transitions. [2022-11-21 09:05:55,229 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 5612 transitions. Word has length 91 [2022-11-21 09:05:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:55,230 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 5612 transitions. [2022-11-21 09:05:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 09:05:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 5612 transitions. [2022-11-21 09:05:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-21 09:05:55,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:55,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:55,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 09:05:55,236 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash 32357188, now seen corresponding path program 1 times [2022-11-21 09:05:55,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:55,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637130812] [2022-11-21 09:05:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:55,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:05:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:05:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 09:05:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 09:05:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-21 09:05:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-21 09:05:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 09:05:55,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637130812] [2022-11-21 09:05:55,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637130812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:55,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:55,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 09:05:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204285379] [2022-11-21 09:05:55,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:55,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 09:05:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 09:05:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:05:55,449 INFO L87 Difference]: Start difference. First operand 4009 states and 5612 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:05:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:57,062 INFO L93 Difference]: Finished difference Result 6047 states and 8217 transitions. [2022-11-21 09:05:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 09:05:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-11-21 09:05:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:57,097 INFO L225 Difference]: With dead ends: 6047 [2022-11-21 09:05:57,098 INFO L226 Difference]: Without dead ends: 5002 [2022-11-21 09:05:57,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-21 09:05:57,104 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 694 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:57,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1162 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 09:05:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2022-11-21 09:05:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4686. [2022-11-21 09:05:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 3830 states have (on average 1.3783289817232376) internal successors, (5279), 3897 states have internal predecessors, (5279), 486 states have call successors, (486), 304 states have call predecessors, (486), 368 states have return successors, (700), 494 states have call predecessors, (700), 482 states have call successors, (700) [2022-11-21 09:05:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 6465 transitions. [2022-11-21 09:05:57,825 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 6465 transitions. Word has length 91 [2022-11-21 09:05:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:05:57,825 INFO L495 AbstractCegarLoop]: Abstraction has 4686 states and 6465 transitions. [2022-11-21 09:05:57,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:05:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 6465 transitions. [2022-11-21 09:05:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-21 09:05:57,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:05:57,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:57,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 09:05:57,831 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:05:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:57,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1971519234, now seen corresponding path program 1 times [2022-11-21 09:05:57,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:57,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104548141] [2022-11-21 09:05:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:05:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:05:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:05:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:05:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 09:05:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 09:05:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-21 09:05:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-21 09:05:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 09:05:57,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:57,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104548141] [2022-11-21 09:05:57,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104548141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:57,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:57,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 09:05:57,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634994881] [2022-11-21 09:05:57,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:57,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:05:57,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:57,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:05:57,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:57,952 INFO L87 Difference]: Start difference. First operand 4686 states and 6465 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-21 09:05:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:05:59,366 INFO L93 Difference]: Finished difference Result 8345 states and 11247 transitions. [2022-11-21 09:05:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 09:05:59,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2022-11-21 09:05:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:05:59,402 INFO L225 Difference]: With dead ends: 8345 [2022-11-21 09:05:59,402 INFO L226 Difference]: Without dead ends: 6625 [2022-11-21 09:05:59,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-21 09:05:59,409 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 775 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:05:59,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 757 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 09:05:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6625 states. [2022-11-21 09:06:00,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6625 to 6405. [2022-11-21 09:06:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6405 states, 5168 states have (on average 1.3432662538699691) internal successors, (6942), 5271 states have internal predecessors, (6942), 679 states have call successors, (679), 438 states have call predecessors, (679), 556 states have return successors, (1040), 707 states have call predecessors, (1040), 675 states have call successors, (1040) [2022-11-21 09:06:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 8661 transitions. [2022-11-21 09:06:00,389 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 8661 transitions. Word has length 91 [2022-11-21 09:06:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:00,390 INFO L495 AbstractCegarLoop]: Abstraction has 6405 states and 8661 transitions. [2022-11-21 09:06:00,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-21 09:06:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 8661 transitions. [2022-11-21 09:06:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-21 09:06:00,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:00,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:00,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 09:06:00,398 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:00,399 INFO L85 PathProgramCache]: Analyzing trace with hash 913681156, now seen corresponding path program 1 times [2022-11-21 09:06:00,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:00,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494967288] [2022-11-21 09:06:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:00,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:06:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:06:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 09:06:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 09:06:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-21 09:06:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-21 09:06:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 09:06:00,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:00,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494967288] [2022-11-21 09:06:00,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494967288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:00,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:06:00,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 09:06:00,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575391431] [2022-11-21 09:06:00,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:00,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 09:06:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:00,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 09:06:00,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:06:00,492 INFO L87 Difference]: Start difference. First operand 6405 states and 8661 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:06:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:01,576 INFO L93 Difference]: Finished difference Result 8243 states and 10964 transitions. [2022-11-21 09:06:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 09:06:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-11-21 09:06:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:01,596 INFO L225 Difference]: With dead ends: 8243 [2022-11-21 09:06:01,596 INFO L226 Difference]: Without dead ends: 4804 [2022-11-21 09:06:01,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-21 09:06:01,607 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 502 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:01,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 620 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 09:06:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2022-11-21 09:06:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4686. [2022-11-21 09:06:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 3830 states have (on average 1.3671018276762401) internal successors, (5236), 3897 states have internal predecessors, (5236), 486 states have call successors, (486), 304 states have call predecessors, (486), 368 states have return successors, (700), 494 states have call predecessors, (700), 482 states have call successors, (700) [2022-11-21 09:06:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 6422 transitions. [2022-11-21 09:06:02,103 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 6422 transitions. Word has length 91 [2022-11-21 09:06:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:02,103 INFO L495 AbstractCegarLoop]: Abstraction has 4686 states and 6422 transitions. [2022-11-21 09:06:02,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:06:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 6422 transitions. [2022-11-21 09:06:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-21 09:06:02,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:02,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:02,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 09:06:02,108 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:02,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1870290611, now seen corresponding path program 1 times [2022-11-21 09:06:02,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:02,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7290728] [2022-11-21 09:06:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:06:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:06:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 09:06:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 09:06:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-21 09:06:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-21 09:06:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 09:06:02,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7290728] [2022-11-21 09:06:02,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7290728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:02,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:06:02,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 09:06:02,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562353876] [2022-11-21 09:06:02,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:02,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 09:06:02,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 09:06:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 09:06:02,270 INFO L87 Difference]: Start difference. First operand 4686 states and 6422 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 09:06:04,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:04,340 INFO L93 Difference]: Finished difference Result 7512 states and 10024 transitions. [2022-11-21 09:06:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 09:06:04,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2022-11-21 09:06:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:04,360 INFO L225 Difference]: With dead ends: 7512 [2022-11-21 09:06:04,360 INFO L226 Difference]: Without dead ends: 5485 [2022-11-21 09:06:04,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-11-21 09:06:04,368 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 1806 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:04,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1839 Valid, 1015 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 09:06:04,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5485 states. [2022-11-21 09:06:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5485 to 5308. [2022-11-21 09:06:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5308 states, 4296 states have (on average 1.3424115456238361) internal successors, (5767), 4371 states have internal predecessors, (5767), 564 states have call successors, (564), 352 states have call predecessors, (564), 446 states have return successors, (833), 594 states have call predecessors, (833), 560 states have call successors, (833) [2022-11-21 09:06:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5308 states to 5308 states and 7164 transitions. [2022-11-21 09:06:05,063 INFO L78 Accepts]: Start accepts. Automaton has 5308 states and 7164 transitions. Word has length 92 [2022-11-21 09:06:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:05,063 INFO L495 AbstractCegarLoop]: Abstraction has 5308 states and 7164 transitions. [2022-11-21 09:06:05,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 09:06:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 5308 states and 7164 transitions. [2022-11-21 09:06:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-21 09:06:05,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:05,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:05,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 09:06:05,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash 56705439, now seen corresponding path program 1 times [2022-11-21 09:06:05,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:05,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385651382] [2022-11-21 09:06:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:05,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-21 09:06:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-21 09:06:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 09:06:05,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:05,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385651382] [2022-11-21 09:06:05,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385651382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:05,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294802561] [2022-11-21 09:06:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:05,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:05,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:05,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:05,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:06:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 09:06:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-21 09:06:05,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:05,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294802561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:05,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:05,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 09:06:05,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509449218] [2022-11-21 09:06:05,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:05,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:05,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:05,500 INFO L87 Difference]: Start difference. First operand 5308 states and 7164 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-21 09:06:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:06,874 INFO L93 Difference]: Finished difference Result 11026 states and 15472 transitions. [2022-11-21 09:06:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2022-11-21 09:06:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:06,941 INFO L225 Difference]: With dead ends: 11026 [2022-11-21 09:06:06,941 INFO L226 Difference]: Without dead ends: 5838 [2022-11-21 09:06:06,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:06,953 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 153 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:06,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 829 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:06,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5838 states. [2022-11-21 09:06:07,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5838 to 5838. [2022-11-21 09:06:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 4743 states have (on average 1.3487244360109636) internal successors, (6397), 4822 states have internal predecessors, (6397), 613 states have call successors, (613), 382 states have call predecessors, (613), 480 states have return successors, (911), 643 states have call predecessors, (911), 609 states have call successors, (911) [2022-11-21 09:06:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 7921 transitions. [2022-11-21 09:06:07,459 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 7921 transitions. Word has length 111 [2022-11-21 09:06:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:07,459 INFO L495 AbstractCegarLoop]: Abstraction has 5838 states and 7921 transitions. [2022-11-21 09:06:07,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-21 09:06:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 7921 transitions. [2022-11-21 09:06:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-21 09:06:07,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:07,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:07,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:07,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 09:06:07,677 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:07,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:07,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1296496829, now seen corresponding path program 1 times [2022-11-21 09:06:07,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:07,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363238354] [2022-11-21 09:06:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:07,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-21 09:06:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-21 09:06:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-21 09:06:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-21 09:06:07,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:07,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363238354] [2022-11-21 09:06:07,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363238354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:07,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489524896] [2022-11-21 09:06:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:07,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:07,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:07,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:07,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:06:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 09:06:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-21 09:06:08,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:08,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489524896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:08,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:08,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-21 09:06:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134731343] [2022-11-21 09:06:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:08,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:08,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:08,200 INFO L87 Difference]: Start difference. First operand 5838 states and 7921 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-21 09:06:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:09,234 INFO L93 Difference]: Finished difference Result 12594 states and 17806 transitions. [2022-11-21 09:06:09,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:09,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2022-11-21 09:06:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:09,266 INFO L225 Difference]: With dead ends: 12594 [2022-11-21 09:06:09,266 INFO L226 Difference]: Without dead ends: 9121 [2022-11-21 09:06:09,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:09,280 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 252 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:09,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 518 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9121 states. [2022-11-21 09:06:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9121 to 9051. [2022-11-21 09:06:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9051 states, 7446 states have (on average 1.3759065269943593) internal successors, (10245), 7568 states have internal predecessors, (10245), 905 states have call successors, (905), 572 states have call predecessors, (905), 698 states have return successors, (1355), 920 states have call predecessors, (1355), 901 states have call successors, (1355) [2022-11-21 09:06:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9051 states to 9051 states and 12505 transitions. [2022-11-21 09:06:10,116 INFO L78 Accepts]: Start accepts. Automaton has 9051 states and 12505 transitions. Word has length 143 [2022-11-21 09:06:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:10,117 INFO L495 AbstractCegarLoop]: Abstraction has 9051 states and 12505 transitions. [2022-11-21 09:06:10,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-21 09:06:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 9051 states and 12505 transitions. [2022-11-21 09:06:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-21 09:06:10,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:10,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:10,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:10,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 09:06:10,339 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:10,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:10,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2080420097, now seen corresponding path program 1 times [2022-11-21 09:06:10,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:10,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927818031] [2022-11-21 09:06:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:10,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-21 09:06:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-21 09:06:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-21 09:06:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-21 09:06:10,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:10,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927818031] [2022-11-21 09:06:10,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927818031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:10,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507176373] [2022-11-21 09:06:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:10,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:10,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:10,508 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:10,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 09:06:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 09:06:10,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-21 09:06:10,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:10,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507176373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:10,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:10,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-21 09:06:10,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489970400] [2022-11-21 09:06:10,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:10,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:10,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:10,806 INFO L87 Difference]: Start difference. First operand 9051 states and 12505 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-21 09:06:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:12,289 INFO L93 Difference]: Finished difference Result 16387 states and 23265 transitions. [2022-11-21 09:06:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2022-11-21 09:06:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:12,333 INFO L225 Difference]: With dead ends: 16387 [2022-11-21 09:06:12,333 INFO L226 Difference]: Without dead ends: 12177 [2022-11-21 09:06:12,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:12,352 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 253 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:12,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 538 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2022-11-21 09:06:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 12077. [2022-11-21 09:06:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12077 states, 9997 states have (on average 1.3899169750925278) internal successors, (13895), 10153 states have internal predecessors, (13895), 1181 states have call successors, (1181), 747 states have call predecessors, (1181), 897 states have return successors, (1750), 1186 states have call predecessors, (1750), 1177 states have call successors, (1750) [2022-11-21 09:06:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12077 states to 12077 states and 16826 transitions. [2022-11-21 09:06:13,616 INFO L78 Accepts]: Start accepts. Automaton has 12077 states and 16826 transitions. Word has length 143 [2022-11-21 09:06:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:13,617 INFO L495 AbstractCegarLoop]: Abstraction has 12077 states and 16826 transitions. [2022-11-21 09:06:13,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-21 09:06:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 12077 states and 16826 transitions. [2022-11-21 09:06:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-21 09:06:13,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:13,640 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:13,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 09:06:13,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:13,845 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:13,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1194272178, now seen corresponding path program 1 times [2022-11-21 09:06:13,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:13,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502889786] [2022-11-21 09:06:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:13,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:13,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:13,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:13,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 09:06:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:13,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:06:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 09:06:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 09:06:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:13,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-21 09:06:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:13,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-21 09:06:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-21 09:06:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-21 09:06:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-21 09:06:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 09:06:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 09:06:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-21 09:06:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 09:06:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-21 09:06:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-21 09:06:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-21 09:06:14,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:14,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502889786] [2022-11-21 09:06:14,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502889786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:14,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553243155] [2022-11-21 09:06:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:14,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:14,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:14,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:14,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 09:06:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 09:06:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-21 09:06:14,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:14,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553243155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:14,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:14,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-11-21 09:06:14,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52241037] [2022-11-21 09:06:14,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:14,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:14,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:14,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-21 09:06:14,343 INFO L87 Difference]: Start difference. First operand 12077 states and 16826 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 09:06:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:15,765 INFO L93 Difference]: Finished difference Result 16402 states and 22141 transitions. [2022-11-21 09:06:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2022-11-21 09:06:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:15,816 INFO L225 Difference]: With dead ends: 16402 [2022-11-21 09:06:15,816 INFO L226 Difference]: Without dead ends: 14214 [2022-11-21 09:06:15,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-21 09:06:15,829 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 61 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:15,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 671 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14214 states. [2022-11-21 09:06:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14214 to 14169. [2022-11-21 09:06:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14169 states, 11622 states have (on average 1.3631905007743934) internal successors, (15843), 11807 states have internal predecessors, (15843), 1415 states have call successors, (1415), 929 states have call predecessors, (1415), 1130 states have return successors, (2057), 1442 states have call predecessors, (2057), 1411 states have call successors, (2057) [2022-11-21 09:06:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14169 states to 14169 states and 19315 transitions. [2022-11-21 09:06:17,596 INFO L78 Accepts]: Start accepts. Automaton has 14169 states and 19315 transitions. Word has length 163 [2022-11-21 09:06:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:17,596 INFO L495 AbstractCegarLoop]: Abstraction has 14169 states and 19315 transitions. [2022-11-21 09:06:17,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 09:06:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14169 states and 19315 transitions. [2022-11-21 09:06:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-21 09:06:17,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:17,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:17,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:17,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:17,828 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash 746982758, now seen corresponding path program 1 times [2022-11-21 09:06:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:17,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458684218] [2022-11-21 09:06:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:17,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:17,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:17,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:17,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-21 09:06:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-21 09:06:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-21 09:06:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-21 09:06:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-21 09:06:18,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458684218] [2022-11-21 09:06:18,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458684218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584403917] [2022-11-21 09:06:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:18,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:18,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:18,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:18,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 09:06:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 09:06:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 09:06:18,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:18,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584403917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:18,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:18,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 09:06:18,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179484020] [2022-11-21 09:06:18,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:18,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:18,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:18,312 INFO L87 Difference]: Start difference. First operand 14169 states and 19315 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-21 09:06:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:20,338 INFO L93 Difference]: Finished difference Result 22989 states and 31923 transitions. [2022-11-21 09:06:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:20,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2022-11-21 09:06:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:20,382 INFO L225 Difference]: With dead ends: 22989 [2022-11-21 09:06:20,383 INFO L226 Difference]: Without dead ends: 13278 [2022-11-21 09:06:20,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:20,405 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 272 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:20,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 369 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13278 states. [2022-11-21 09:06:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13278 to 13278. [2022-11-21 09:06:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13278 states, 10936 states have (on average 1.3204096561814191) internal successors, (14440), 11085 states have internal predecessors, (14440), 1263 states have call successors, (1263), 892 states have call predecessors, (1263), 1077 states have return successors, (1782), 1310 states have call predecessors, (1782), 1259 states have call successors, (1782) [2022-11-21 09:06:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13278 states to 13278 states and 17485 transitions. [2022-11-21 09:06:21,940 INFO L78 Accepts]: Start accepts. Automaton has 13278 states and 17485 transitions. Word has length 160 [2022-11-21 09:06:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:21,940 INFO L495 AbstractCegarLoop]: Abstraction has 13278 states and 17485 transitions. [2022-11-21 09:06:21,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-21 09:06:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 13278 states and 17485 transitions. [2022-11-21 09:06:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-21 09:06:21,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:21,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:21,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:22,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 09:06:22,163 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:22,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1605594576, now seen corresponding path program 1 times [2022-11-21 09:06:22,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:22,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593778026] [2022-11-21 09:06:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-21 09:06:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-21 09:06:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-21 09:06:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-21 09:06:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-21 09:06:22,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:22,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593778026] [2022-11-21 09:06:22,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593778026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747309009] [2022-11-21 09:06:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:22,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:22,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:22,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:22,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 09:06:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 09:06:22,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-21 09:06:22,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:22,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747309009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:22,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:22,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 09:06:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702407628] [2022-11-21 09:06:22,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:22,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:22,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:22,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:22,505 INFO L87 Difference]: Start difference. First operand 13278 states and 17485 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-21 09:06:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:24,167 INFO L93 Difference]: Finished difference Result 22874 states and 30536 transitions. [2022-11-21 09:06:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 160 [2022-11-21 09:06:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:24,217 INFO L225 Difference]: With dead ends: 22874 [2022-11-21 09:06:24,217 INFO L226 Difference]: Without dead ends: 14054 [2022-11-21 09:06:24,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:24,244 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 299 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:24,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 527 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14054 states. [2022-11-21 09:06:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14054 to 13909. [2022-11-21 09:06:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13909 states, 11526 states have (on average 1.2980218636127017) internal successors, (14961), 11670 states have internal predecessors, (14961), 1262 states have call successors, (1262), 931 states have call predecessors, (1262), 1119 states have return successors, (1767), 1317 states have call predecessors, (1767), 1258 states have call successors, (1767) [2022-11-21 09:06:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13909 states to 13909 states and 17990 transitions. [2022-11-21 09:06:25,912 INFO L78 Accepts]: Start accepts. Automaton has 13909 states and 17990 transitions. Word has length 160 [2022-11-21 09:06:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:25,912 INFO L495 AbstractCegarLoop]: Abstraction has 13909 states and 17990 transitions. [2022-11-21 09:06:25,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-21 09:06:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 13909 states and 17990 transitions. [2022-11-21 09:06:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-21 09:06:25,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:25,924 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:25,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:26,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 09:06:26,125 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash 522982663, now seen corresponding path program 1 times [2022-11-21 09:06:26,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:26,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984869918] [2022-11-21 09:06:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:26,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-21 09:06:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-21 09:06:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-21 09:06:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-21 09:06:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-21 09:06:26,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984869918] [2022-11-21 09:06:26,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984869918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614644281] [2022-11-21 09:06:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:26,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:26,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:26,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 09:06:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 09:06:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-21 09:06:26,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:26,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614644281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:26,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:26,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 09:06:26,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124058182] [2022-11-21 09:06:26,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:26,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:26,474 INFO L87 Difference]: Start difference. First operand 13909 states and 17990 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-21 09:06:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:28,943 INFO L93 Difference]: Finished difference Result 31048 states and 41157 transitions. [2022-11-21 09:06:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2022-11-21 09:06:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:28,994 INFO L225 Difference]: With dead ends: 31048 [2022-11-21 09:06:28,994 INFO L226 Difference]: Without dead ends: 21597 [2022-11-21 09:06:29,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:29,010 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 152 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:29,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 821 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21597 states. [2022-11-21 09:06:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21597 to 21593. [2022-11-21 09:06:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21593 states, 18019 states have (on average 1.3083411954048505) internal successors, (23575), 18243 states have internal predecessors, (23575), 1917 states have call successors, (1917), 1400 states have call predecessors, (1917), 1655 states have return successors, (2930), 1967 states have call predecessors, (2930), 1913 states have call successors, (2930) [2022-11-21 09:06:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21593 states to 21593 states and 28422 transitions. [2022-11-21 09:06:31,407 INFO L78 Accepts]: Start accepts. Automaton has 21593 states and 28422 transitions. Word has length 161 [2022-11-21 09:06:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:31,408 INFO L495 AbstractCegarLoop]: Abstraction has 21593 states and 28422 transitions. [2022-11-21 09:06:31,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-21 09:06:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21593 states and 28422 transitions. [2022-11-21 09:06:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-21 09:06:31,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:31,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:31,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:31,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-21 09:06:31,628 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash 675676757, now seen corresponding path program 1 times [2022-11-21 09:06:31,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:31,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190313307] [2022-11-21 09:06:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-21 09:06:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-21 09:06:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-21 09:06:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-21 09:06:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-21 09:06:31,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190313307] [2022-11-21 09:06:31,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190313307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035393331] [2022-11-21 09:06:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:31,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:31,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:31,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 09:06:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 09:06:31,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-21 09:06:31,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:31,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035393331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:31,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:31,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 09:06:31,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728752751] [2022-11-21 09:06:31,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:31,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:31,980 INFO L87 Difference]: Start difference. First operand 21593 states and 28422 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-21 09:06:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:36,141 INFO L93 Difference]: Finished difference Result 55172 states and 74382 transitions. [2022-11-21 09:06:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2022-11-21 09:06:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:36,252 INFO L225 Difference]: With dead ends: 55172 [2022-11-21 09:06:36,252 INFO L226 Difference]: Without dead ends: 38041 [2022-11-21 09:06:36,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:36,282 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 298 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:36,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 553 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38041 states. [2022-11-21 09:06:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38041 to 37835. [2022-11-21 09:06:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37835 states, 31807 states have (on average 1.3086741912157702) internal successors, (41625), 32191 states have internal predecessors, (41625), 3247 states have call successors, (3247), 2396 states have call predecessors, (3247), 2779 states have return successors, (5969), 3281 states have call predecessors, (5969), 3243 states have call successors, (5969) [2022-11-21 09:06:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37835 states to 37835 states and 50841 transitions. [2022-11-21 09:06:40,444 INFO L78 Accepts]: Start accepts. Automaton has 37835 states and 50841 transitions. Word has length 161 [2022-11-21 09:06:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:40,444 INFO L495 AbstractCegarLoop]: Abstraction has 37835 states and 50841 transitions. [2022-11-21 09:06:40,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-21 09:06:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 37835 states and 50841 transitions. [2022-11-21 09:06:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-21 09:06:40,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:40,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:40,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:40,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:40,678 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1567842387, now seen corresponding path program 1 times [2022-11-21 09:06:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:40,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627791450] [2022-11-21 09:06:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:40,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-21 09:06:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-21 09:06:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-21 09:06:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-21 09:06:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-21 09:06:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:40,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627791450] [2022-11-21 09:06:40,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627791450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:40,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:06:40,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:06:40,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070544653] [2022-11-21 09:06:40,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:40,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:06:40,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:06:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:06:40,777 INFO L87 Difference]: Start difference. First operand 37835 states and 50841 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 09:06:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:44,969 INFO L93 Difference]: Finished difference Result 67330 states and 90844 transitions. [2022-11-21 09:06:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:06:44,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2022-11-21 09:06:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:45,073 INFO L225 Difference]: With dead ends: 67330 [2022-11-21 09:06:45,073 INFO L226 Difference]: Without dead ends: 33955 [2022-11-21 09:06:45,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 09:06:45,115 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 445 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:45,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 554 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 09:06:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33955 states. [2022-11-21 09:06:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33955 to 31775. [2022-11-21 09:06:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31775 states, 26625 states have (on average 1.307680751173709) internal successors, (34817), 27174 states have internal predecessors, (34817), 2569 states have call successors, (2569), 1888 states have call predecessors, (2569), 2579 states have return successors, (5056), 2730 states have call predecessors, (5056), 2565 states have call successors, (5056) [2022-11-21 09:06:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31775 states to 31775 states and 42442 transitions. [2022-11-21 09:06:49,185 INFO L78 Accepts]: Start accepts. Automaton has 31775 states and 42442 transitions. Word has length 161 [2022-11-21 09:06:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:49,185 INFO L495 AbstractCegarLoop]: Abstraction has 31775 states and 42442 transitions. [2022-11-21 09:06:49,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 09:06:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 31775 states and 42442 transitions. [2022-11-21 09:06:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-21 09:06:49,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:49,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:49,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-21 09:06:49,214 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash -423691555, now seen corresponding path program 1 times [2022-11-21 09:06:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:49,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480435015] [2022-11-21 09:06:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-21 09:06:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-21 09:06:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-21 09:06:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-21 09:06:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-21 09:06:49,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:49,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480435015] [2022-11-21 09:06:49,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480435015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:49,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484635234] [2022-11-21 09:06:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:49,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:49,377 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:49,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 09:06:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:49,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 09:06:49,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 09:06:49,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:49,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484635234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:49,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:49,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 09:06:49,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573443984] [2022-11-21 09:06:49,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:49,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:49,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:49,586 INFO L87 Difference]: Start difference. First operand 31775 states and 42442 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-21 09:06:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:54,153 INFO L93 Difference]: Finished difference Result 50520 states and 69980 transitions. [2022-11-21 09:06:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2022-11-21 09:06:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:54,222 INFO L225 Difference]: With dead ends: 50520 [2022-11-21 09:06:54,223 INFO L226 Difference]: Without dead ends: 31859 [2022-11-21 09:06:54,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:54,257 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 141 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:54,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 755 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31859 states. [2022-11-21 09:06:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31859 to 31775. [2022-11-21 09:06:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31775 states, 26625 states have (on average 1.2862347417840376) internal successors, (34246), 27174 states have internal predecessors, (34246), 2569 states have call successors, (2569), 1888 states have call predecessors, (2569), 2579 states have return successors, (5056), 2730 states have call predecessors, (5056), 2565 states have call successors, (5056) [2022-11-21 09:06:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31775 states to 31775 states and 41871 transitions. [2022-11-21 09:06:59,100 INFO L78 Accepts]: Start accepts. Automaton has 31775 states and 41871 transitions. Word has length 163 [2022-11-21 09:06:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:59,101 INFO L495 AbstractCegarLoop]: Abstraction has 31775 states and 41871 transitions. [2022-11-21 09:06:59,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-21 09:06:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 31775 states and 41871 transitions. [2022-11-21 09:06:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-21 09:06:59,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:59,138 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:59,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:59,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 09:06:59,339 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1271742787, now seen corresponding path program 1 times [2022-11-21 09:06:59,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:59,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050421090] [2022-11-21 09:06:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:59,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 09:06:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 09:06:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-21 09:06:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 09:06:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-21 09:06:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-21 09:06:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-21 09:06:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-21 09:06:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-21 09:06:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-21 09:06:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-21 09:06:59,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050421090] [2022-11-21 09:06:59,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050421090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951498153] [2022-11-21 09:06:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:59,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:59,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:59,495 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:59,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438fb4ca-6e0c-4afd-ad13-ab3d80005da2/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 09:06:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:59,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 09:06:59,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 09:06:59,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:59,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951498153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:59,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:06:59,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 09:06:59,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339020390] [2022-11-21 09:06:59,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:59,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:59,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:06:59,721 INFO L87 Difference]: Start difference. First operand 31775 states and 41871 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)