./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:00:52,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:00:52,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:00:52,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:00:52,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:00:52,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:00:52,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:00:52,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:00:52,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:00:52,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:00:52,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:00:52,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:00:52,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:00:52,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:00:52,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:00:52,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:00:52,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:00:52,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:00:52,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:00:52,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:00:52,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:00:52,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:00:52,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:00:52,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:00:52,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:00:52,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:00:52,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:00:52,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:00:52,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:00:52,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:00:52,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:00:52,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:00:52,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:00:52,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:00:52,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:00:52,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:00:52,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:00:52,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:00:52,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:00:52,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:00:52,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:00:52,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:00:52,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:00:52,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:00:52,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:00:52,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:00:52,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:00:52,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:00:52,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:00:52,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:00:52,173 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:00:52,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:00:52,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:00:52,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:00:52,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:00:52,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:00:52,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:00:52,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:00:52,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:00:52,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:00:52,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:00:52,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:00:52,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:00:52,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:00:52,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:00:52,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:00:52,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:00:52,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:00:52,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:00:52,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:00:52,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:00:52,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:00:52,180 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:00:52,180 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:00:52,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:00:52,181 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_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2022-11-18 20:00:52,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:00:52,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:00:52,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:00:52,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:00:52,506 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:00:52,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-18 20:00:52,582 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/data/d08f07a59/a71234666a4f40be893b9ec90d209611/FLAG88305691b [2022-11-18 20:00:53,026 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:00:53,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-18 20:00:53,034 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/data/d08f07a59/a71234666a4f40be893b9ec90d209611/FLAG88305691b [2022-11-18 20:00:53,420 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/data/d08f07a59/a71234666a4f40be893b9ec90d209611 [2022-11-18 20:00:53,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:00:53,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:00:53,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:00:53,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:00:53,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:00:53,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231340ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53, skipping insertion in model container [2022-11-18 20:00:53,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:00:53,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:00:53,695 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-18 20:00:53,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:00:53,721 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:00:53,733 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-18 20:00:53,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:00:53,753 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:00:53,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53 WrapperNode [2022-11-18 20:00:53,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:00:53,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:00:53,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:00:53,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:00:53,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,793 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2022-11-18 20:00:53,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:00:53,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:00:53,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:00:53,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:00:53,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,835 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:00:53,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:00:53,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:00:53,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:00:53,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (1/1) ... [2022-11-18 20:00:53,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:00:53,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:53,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:00:53,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:00:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:00:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:00:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:00:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:00:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:00:53,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:00:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:00:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:00:54,015 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:00:54,017 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:00:54,179 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:00:54,185 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:00:54,185 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:00:54,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:00:54 BoogieIcfgContainer [2022-11-18 20:00:54,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:00:54,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:00:54,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:00:54,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:00:54,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:00:53" (1/3) ... [2022-11-18 20:00:54,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2ac570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:00:54, skipping insertion in model container [2022-11-18 20:00:54,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:53" (2/3) ... [2022-11-18 20:00:54,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2ac570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:00:54, skipping insertion in model container [2022-11-18 20:00:54,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:00:54" (3/3) ... [2022-11-18 20:00:54,211 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2022-11-18 20:00:54,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:00:54,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:00:54,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:00:54,312 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;@4ae5f90e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:00:54,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:00:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:00:54,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:54,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:54,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2022-11-18 20:00:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:54,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374940159] [2022-11-18 20:00:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:54,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:54,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374940159] [2022-11-18 20:00:54,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374940159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:54,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:54,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:00:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452254767] [2022-11-18 20:00:54,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:54,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:00:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:00:54,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:00:54,633 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:54,652 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-11-18 20:00:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:00:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 20:00:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:54,663 INFO L225 Difference]: With dead ends: 36 [2022-11-18 20:00:54,663 INFO L226 Difference]: Without dead ends: 16 [2022-11-18 20:00:54,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:00:54,671 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:54,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-18 20:00:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-18 20:00:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-18 20:00:54,706 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2022-11-18 20:00:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:54,707 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-18 20:00:54,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-18 20:00:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:00:54,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:54,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:54,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:00:54,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2022-11-18 20:00:54,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:54,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750863823] [2022-11-18 20:00:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:54,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:54,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750863823] [2022-11-18 20:00:54,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750863823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:54,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:54,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:00:54,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435243259] [2022-11-18 20:00:54,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:54,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:00:54,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:54,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:00:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:00:54,837 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:54,889 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-11-18 20:00:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:00:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 20:00:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:54,891 INFO L225 Difference]: With dead ends: 34 [2022-11-18 20:00:54,891 INFO L226 Difference]: Without dead ends: 26 [2022-11-18 20:00:54,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:00:54,894 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:54,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-18 20:00:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2022-11-18 20:00:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-18 20:00:54,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-11-18 20:00:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:54,908 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-18 20:00:54,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-18 20:00:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:00:54,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:54,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:00:54,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:54,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1200955363, now seen corresponding path program 1 times [2022-11-18 20:00:54,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:54,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339854289] [2022-11-18 20:00:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:55,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339854289] [2022-11-18 20:00:55,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339854289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559950318] [2022-11-18 20:00:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:55,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:55,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:55,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:00:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:00:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:55,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:55,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559950318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:55,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:00:55,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-18 20:00:55,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586885363] [2022-11-18 20:00:55,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:55,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:00:55,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:55,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:00:55,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:00:55,138 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:55,151 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-18 20:00:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:00:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 20:00:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:55,152 INFO L225 Difference]: With dead ends: 31 [2022-11-18 20:00:55,152 INFO L226 Difference]: Without dead ends: 17 [2022-11-18 20:00:55,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:00:55,154 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:55,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-18 20:00:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-18 20:00:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-18 20:00:55,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-18 20:00:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:55,159 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-18 20:00:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-18 20:00:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:00:55,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:55,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:55,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:55,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:55,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash 391608737, now seen corresponding path program 1 times [2022-11-18 20:00:55,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:55,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825878476] [2022-11-18 20:00:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:55,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:55,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:55,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825878476] [2022-11-18 20:00:55,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825878476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:55,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263664674] [2022-11-18 20:00:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:55,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:55,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:55,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:55,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:00:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:55,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:00:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:55,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:55,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263664674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:55,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:00:55,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-18 20:00:55,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785296828] [2022-11-18 20:00:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:55,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:00:55,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:55,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:00:55,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:00:55,626 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:55,647 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-11-18 20:00:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:00:55,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 20:00:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:55,649 INFO L225 Difference]: With dead ends: 32 [2022-11-18 20:00:55,650 INFO L226 Difference]: Without dead ends: 19 [2022-11-18 20:00:55,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:00:55,652 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:55,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-18 20:00:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-11-18 20:00:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-18 20:00:55,663 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2022-11-18 20:00:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:55,663 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-18 20:00:55,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-18 20:00:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:00:55,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:55,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:55,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:55,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:55,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2022-11-18 20:00:55,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:55,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035348393] [2022-11-18 20:00:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:55,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035348393] [2022-11-18 20:00:55,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035348393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019153740] [2022-11-18 20:00:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:55,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:55,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:55,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:55,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:00:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:56,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:00:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:56,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:56,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019153740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:56,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:00:56,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-18 20:00:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137991588] [2022-11-18 20:00:56,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:56,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:00:56,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:56,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:00:56,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:00:56,093 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:56,152 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-11-18 20:00:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:00:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 20:00:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:56,153 INFO L225 Difference]: With dead ends: 56 [2022-11-18 20:00:56,154 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 20:00:56,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:00:56,155 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:56,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 20:00:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-11-18 20:00:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-18 20:00:56,161 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2022-11-18 20:00:56,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:56,161 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-18 20:00:56,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-18 20:00:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:00:56,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:56,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:56,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:56,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:56,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2044266853, now seen corresponding path program 2 times [2022-11-18 20:00:56,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:56,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860980899] [2022-11-18 20:00:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:56,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:00:56,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:56,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860980899] [2022-11-18 20:00:56,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860980899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436041812] [2022-11-18 20:00:56,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:00:56,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:56,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:56,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:56,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:00:56,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:00:56,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:56,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:00:56,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:00:56,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:00:56,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436041812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:56,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:00:56,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-11-18 20:00:56,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44454036] [2022-11-18 20:00:56,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:56,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:00:56,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:56,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:00:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:00:56,796 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:56,906 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-11-18 20:00:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:00:56,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-18 20:00:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:56,907 INFO L225 Difference]: With dead ends: 81 [2022-11-18 20:00:56,907 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 20:00:56,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:00:56,909 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:56,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:00:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 20:00:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2022-11-18 20:00:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-11-18 20:00:56,916 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2022-11-18 20:00:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:56,916 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-11-18 20:00:56,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-11-18 20:00:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:00:56,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:56,918 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:56,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:57,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:00:57,123 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1130748941, now seen corresponding path program 3 times [2022-11-18 20:00:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:57,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027948254] [2022-11-18 20:00:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:57,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:00:57,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027948254] [2022-11-18 20:00:57,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027948254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15555214] [2022-11-18 20:00:57,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:00:57,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:57,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:57,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:57,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:00:57,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:00:57,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:57,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:00:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:00:57,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:57,695 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:00:57,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-11-18 20:00:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:00:57,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15555214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:57,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:00:57,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-11-18 20:00:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410859110] [2022-11-18 20:00:57,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:57,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:00:57,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:00:57,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:00:57,715 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:58,056 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2022-11-18 20:00:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:00:58,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-18 20:00:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:58,061 INFO L225 Difference]: With dead ends: 104 [2022-11-18 20:00:58,061 INFO L226 Difference]: Without dead ends: 96 [2022-11-18 20:00:58,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:00:58,063 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 170 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:58,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 121 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:00:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-18 20:00:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 48. [2022-11-18 20:00:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-11-18 20:00:58,085 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2022-11-18 20:00:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:58,086 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-11-18 20:00:58,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-11-18 20:00:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:00:58,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:58,089 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:58,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:58,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:58,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash 927320518, now seen corresponding path program 1 times [2022-11-18 20:00:58,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:58,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367701265] [2022-11-18 20:00:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:58,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-18 20:00:58,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367701265] [2022-11-18 20:00:58,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367701265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:58,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:58,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:00:58,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72001804] [2022-11-18 20:00:58,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:58,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:00:58,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:58,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:00:58,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:00:58,428 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:58,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:58,438 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-18 20:00:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:00:58,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-18 20:00:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:58,439 INFO L225 Difference]: With dead ends: 55 [2022-11-18 20:00:58,439 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 20:00:58,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:00:58,440 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:58,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:58,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 20:00:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-18 20:00:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-11-18 20:00:58,452 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-11-18 20:00:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:58,454 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-11-18 20:00:58,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-11-18 20:00:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:00:58,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:58,455 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:00:58,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2012771472, now seen corresponding path program 1 times [2022-11-18 20:00:58,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:58,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065824889] [2022-11-18 20:00:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:58,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-18 20:00:58,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:58,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065824889] [2022-11-18 20:00:58,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065824889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:58,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654599412] [2022-11-18 20:00:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:58,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:58,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:58,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:58,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:00:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:00:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:00:59,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:00:59,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654599412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:59,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:00:59,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 29 [2022-11-18 20:00:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541114304] [2022-11-18 20:00:59,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:59,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:00:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:00:59,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:00:59,326 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:59,487 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2022-11-18 20:00:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:00:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-18 20:00:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:59,489 INFO L225 Difference]: With dead ends: 132 [2022-11-18 20:00:59,489 INFO L226 Difference]: Without dead ends: 107 [2022-11-18 20:00:59,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:00:59,490 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:59,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 85 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:00:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-18 20:00:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2022-11-18 20:00:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-11-18 20:00:59,501 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 47 [2022-11-18 20:00:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:59,502 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-11-18 20:00:59,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-11-18 20:00:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:00:59,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:59,503 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:59,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:59,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:59,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:59,709 INFO L85 PathProgramCache]: Analyzing trace with hash 426637324, now seen corresponding path program 2 times [2022-11-18 20:00:59,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:59,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032795252] [2022-11-18 20:00:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:59,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2022-11-18 20:00:59,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032795252] [2022-11-18 20:00:59,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032795252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:59,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700853776] [2022-11-18 20:00:59,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:00:59,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:59,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:59,950 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:59,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:01:00,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:01:00,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:01:00,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 20:01:00,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 20:01:01,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700853776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:01,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:01:01,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 25] total 54 [2022-11-18 20:01:01,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267619245] [2022-11-18 20:01:01,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:01,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-18 20:01:01,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:01:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-18 20:01:01,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=1707, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 20:01:01,788 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:02,034 INFO L93 Difference]: Finished difference Result 193 states and 221 transitions. [2022-11-18 20:01:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:01:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-18 20:01:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:02,036 INFO L225 Difference]: With dead ends: 193 [2022-11-18 20:01:02,036 INFO L226 Difference]: Without dead ends: 165 [2022-11-18 20:01:02,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1155, Invalid=1707, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 20:01:02,038 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:02,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 90 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:01:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-18 20:01:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2022-11-18 20:01:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2022-11-18 20:01:02,052 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 74 [2022-11-18 20:01:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:02,053 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2022-11-18 20:01:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2022-11-18 20:01:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-18 20:01:02,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:02,055 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:02,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:01:02,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:01:02,260 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:01:02,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash -374145592, now seen corresponding path program 3 times [2022-11-18 20:01:02,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:01:02,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435552368] [2022-11-18 20:01:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:02,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:01:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2022-11-18 20:01:02,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:01:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435552368] [2022-11-18 20:01:02,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435552368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:02,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987282090] [2022-11-18 20:01:02,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:01:02,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:02,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:01:02,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:01:02,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:01:02,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:01:02,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:01:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2022-11-18 20:01:03,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:03,256 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:01:03,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-11-18 20:01:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2022-11-18 20:01:03,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987282090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:03,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:01:03,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2022-11-18 20:01:03,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731194289] [2022-11-18 20:01:03,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:03,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:01:03,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:01:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:01:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:01:03,287 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:03,648 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-11-18 20:01:03,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:01:03,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-11-18 20:01:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:03,650 INFO L225 Difference]: With dead ends: 184 [2022-11-18 20:01:03,650 INFO L226 Difference]: Without dead ends: 173 [2022-11-18 20:01:03,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=1087, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:01:03,651 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 323 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:03,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 113 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:01:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-18 20:01:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2022-11-18 20:01:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-11-18 20:01:03,668 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2022-11-18 20:01:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:03,670 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-11-18 20:01:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-11-18 20:01:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-18 20:01:03,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:03,680 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 7, 7, 7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:03,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:03,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:03,886 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:01:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1426478299, now seen corresponding path program 4 times [2022-11-18 20:01:03,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:01:03,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929989430] [2022-11-18 20:01:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:01:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-18 20:01:04,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:01:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929989430] [2022-11-18 20:01:04,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929989430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757013084] [2022-11-18 20:01:04,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:01:04,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:04,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:01:04,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:01:04,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:01:04,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:01:04,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:01:04,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-18 20:01:04,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-18 20:01:04,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757013084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:04,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:01:04,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-11-18 20:01:04,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616266008] [2022-11-18 20:01:04,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:04,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:01:04,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:01:04,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:01:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:01:04,639 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:04,802 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2022-11-18 20:01:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:01:04,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-11-18 20:01:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:04,804 INFO L225 Difference]: With dead ends: 271 [2022-11-18 20:01:04,804 INFO L226 Difference]: Without dead ends: 255 [2022-11-18 20:01:04,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:01:04,805 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 236 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:04,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 107 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:01:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-18 20:01:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 161. [2022-11-18 20:01:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-11-18 20:01:04,819 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 133 [2022-11-18 20:01:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:04,820 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-11-18 20:01:04,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-11-18 20:01:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-18 20:01:04,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:04,822 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 16, 16, 16, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:04,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:01:05,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:01:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1100159513, now seen corresponding path program 5 times [2022-11-18 20:01:05,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:01:05,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309790697] [2022-11-18 20:01:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:05,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:01:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-18 20:01:05,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:01:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309790697] [2022-11-18 20:01:05,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309790697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680662112] [2022-11-18 20:01:05,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:01:05,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:05,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:01:05,744 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:01:05,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:01:55,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-18 20:01:55,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:55,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:01:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-18 20:01:55,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-18 20:01:56,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680662112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:56,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:01:56,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-11-18 20:01:56,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127225731] [2022-11-18 20:01:56,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:56,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:01:56,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:01:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:01:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:01:56,452 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:56,881 INFO L93 Difference]: Finished difference Result 451 states and 471 transitions. [2022-11-18 20:01:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:01:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-18 20:01:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:56,883 INFO L225 Difference]: With dead ends: 451 [2022-11-18 20:01:56,884 INFO L226 Difference]: Without dead ends: 435 [2022-11-18 20:01:56,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:01:56,907 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 692 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:56,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 191 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:01:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-18 20:01:56,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 215. [2022-11-18 20:01:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2022-11-18 20:01:56,926 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 160 [2022-11-18 20:01:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:56,927 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2022-11-18 20:01:56,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2022-11-18 20:01:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-18 20:01:56,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:56,929 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 34, 34, 34, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:56,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:57,146 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:01:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1453073049, now seen corresponding path program 6 times [2022-11-18 20:01:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:01:57,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646338716] [2022-11-18 20:01:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:01:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-18 20:01:58,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:01:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646338716] [2022-11-18 20:01:58,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646338716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951478734] [2022-11-18 20:01:58,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:01:58,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:01:58,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:01:58,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:01:59,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-18 20:01:59,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:59,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:01:59,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2022-11-18 20:02:00,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:00,516 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:02:00,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-11-18 20:02:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 31 proven. 240 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2022-11-18 20:02:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951478734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:00,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:02:00,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12, 11] total 55 [2022-11-18 20:02:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171513333] [2022-11-18 20:02:00,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:00,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 20:02:00,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 20:02:00,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1005, Invalid=1965, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:02:00,562 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 55 states, 55 states have (on average 3.1272727272727274) internal successors, (172), 55 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:03,365 INFO L93 Difference]: Finished difference Result 467 states and 471 transitions. [2022-11-18 20:02:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 20:02:03,366 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.1272727272727274) internal successors, (172), 55 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2022-11-18 20:02:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:03,367 INFO L225 Difference]: With dead ends: 467 [2022-11-18 20:02:03,367 INFO L226 Difference]: Without dead ends: 451 [2022-11-18 20:02:03,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 409 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3930 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4718, Invalid=11032, Unknown=0, NotChecked=0, Total=15750 [2022-11-18 20:02:03,373 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1254 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:03,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 304 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:02:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-18 20:02:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 223. [2022-11-18 20:02:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2022-11-18 20:02:03,390 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 214 [2022-11-18 20:02:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:03,391 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2022-11-18 20:02:03,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.1272727272727274) internal successors, (172), 55 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2022-11-18 20:02:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-18 20:02:03,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:03,394 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 35, 35, 35, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:03,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 20:02:03,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:02:03,600 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:02:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash 555566940, now seen corresponding path program 7 times [2022-11-18 20:02:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:03,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742433642] [2022-11-18 20:02:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:03,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 2140 trivial. 0 not checked. [2022-11-18 20:02:05,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:05,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742433642] [2022-11-18 20:02:05,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742433642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:05,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474196022] [2022-11-18 20:02:05,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:02:05,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:05,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:05,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:02:05,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:02:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 20:02:05,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2022-11-18 20:02:07,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2022-11-18 20:02:11,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474196022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:11,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:02:11,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 49, 49] total 132 [2022-11-18 20:02:11,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447740051] [2022-11-18 20:02:11,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:11,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-11-18 20:02:11,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-11-18 20:02:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5262, Invalid=12030, Unknown=0, NotChecked=0, Total=17292 [2022-11-18 20:02:11,799 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:12,717 INFO L93 Difference]: Finished difference Result 685 states and 737 transitions. [2022-11-18 20:02:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-18 20:02:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-18 20:02:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:12,720 INFO L225 Difference]: With dead ends: 685 [2022-11-18 20:02:12,720 INFO L226 Difference]: Without dead ends: 557 [2022-11-18 20:02:12,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3290 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5262, Invalid=12030, Unknown=0, NotChecked=0, Total=17292 [2022-11-18 20:02:12,727 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 846 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:12,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 260 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:02:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-11-18 20:02:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 322. [2022-11-18 20:02:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.0093457943925233) internal successors, (324), 321 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2022-11-18 20:02:12,753 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 222 [2022-11-18 20:02:12,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:12,753 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2022-11-18 20:02:12,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2022-11-18 20:02:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-18 20:02:12,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:12,759 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 36, 36, 36, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:12,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:12,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:02:12,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:02:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash 194024584, now seen corresponding path program 8 times [2022-11-18 20:02:12,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:12,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960731329] [2022-11-18 20:02:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:12,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 8860 trivial. 0 not checked. [2022-11-18 20:02:15,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:15,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960731329] [2022-11-18 20:02:15,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960731329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:15,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912976353] [2022-11-18 20:02:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:15,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:15,098 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:02:15,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:02:15,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:15,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-18 20:02:15,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2022-11-18 20:02:21,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2022-11-18 20:02:35,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912976353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:35,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:02:35,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 97, 97] total 229 [2022-11-18 20:02:35,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907718369] [2022-11-18 20:02:35,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:35,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 229 states [2022-11-18 20:02:35,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2022-11-18 20:02:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19076, Invalid=33136, Unknown=0, NotChecked=0, Total=52212 [2022-11-18 20:02:35,721 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:37,548 INFO L93 Difference]: Finished difference Result 890 states and 990 transitions. [2022-11-18 20:02:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-18 20:02:37,549 INFO L78 Accepts]: Start accepts. Automaton has has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2022-11-18 20:02:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:37,552 INFO L225 Difference]: With dead ends: 890 [2022-11-18 20:02:37,552 INFO L226 Difference]: Without dead ends: 759 [2022-11-18 20:02:37,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6840 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=19076, Invalid=33136, Unknown=0, NotChecked=0, Total=52212 [2022-11-18 20:02:37,557 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1019 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:37,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1019 Valid, 251 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:02:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-11-18 20:02:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 517. [2022-11-18 20:02:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.005813953488372) internal successors, (519), 516 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 519 transitions. [2022-11-18 20:02:37,591 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 519 transitions. Word has length 321 [2022-11-18 20:02:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:37,591 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 519 transitions. [2022-11-18 20:02:37,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 519 transitions. [2022-11-18 20:02:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-11-18 20:02:37,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:37,603 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 37, 37, 37, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:37,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:37,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:02:37,811 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:02:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1185820924, now seen corresponding path program 9 times [2022-11-18 20:02:37,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:37,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984685714] [2022-11-18 20:02:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:37,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 36124 trivial. 0 not checked. [2022-11-18 20:02:40,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984685714] [2022-11-18 20:02:40,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984685714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517136528] [2022-11-18 20:02:40,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:02:40,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:40,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:40,764 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:02:40,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:02:41,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-18 20:02:41,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:02:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 0 proven. 409 refuted. 0 times theorem prover too weak. 37750 trivial. 0 not checked. [2022-11-18 20:02:42,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:42,790 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:02:42,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-11-18 20:02:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 33 proven. 376 refuted. 0 times theorem prover too weak. 37750 trivial. 0 not checked. [2022-11-18 20:02:42,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517136528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:42,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:02:42,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 14, 13] total 62 [2022-11-18 20:02:42,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542118940] [2022-11-18 20:02:42,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:42,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 20:02:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 20:02:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1265, Invalid=2517, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 20:02:42,874 INFO L87 Difference]: Start difference. First operand 517 states and 519 transitions. Second operand has 62 states, 62 states have (on average 3.1774193548387095) internal successors, (197), 62 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:46,158 INFO L93 Difference]: Finished difference Result 788 states and 792 transitions. [2022-11-18 20:02:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-18 20:02:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.1774193548387095) internal successors, (197), 62 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 516 [2022-11-18 20:02:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:46,163 INFO L225 Difference]: With dead ends: 788 [2022-11-18 20:02:46,164 INFO L226 Difference]: Without dead ends: 767 [2022-11-18 20:02:46,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1009 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4909 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5527, Invalid=13379, Unknown=0, NotChecked=0, Total=18906 [2022-11-18 20:02:46,166 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1511 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:46,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1511 Valid, 389 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:02:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-11-18 20:02:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 525. [2022-11-18 20:02:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.0057251908396947) internal successors, (527), 524 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 527 transitions. [2022-11-18 20:02:46,216 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 527 transitions. Word has length 516 [2022-11-18 20:02:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:46,217 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 527 transitions. [2022-11-18 20:02:46,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.1774193548387095) internal successors, (197), 62 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 527 transitions. [2022-11-18 20:02:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-11-18 20:02:46,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:46,227 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 38, 38, 38, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:46,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:46,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:02:46,433 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:02:46,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1093515801, now seen corresponding path program 10 times [2022-11-18 20:02:46,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:46,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923434093] [2022-11-18 20:02:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2022-11-18 20:02:49,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:49,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923434093] [2022-11-18 20:02:49,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923434093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:49,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100132826] [2022-11-18 20:02:49,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:02:49,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:49,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:49,179 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:02:49,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:02:49,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:02:49,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:02:49,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2022-11-18 20:02:50,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2022-11-18 20:02:51,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100132826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:51,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:02:51,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2022-11-18 20:02:51,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375683195] [2022-11-18 20:02:51,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:51,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-18 20:02:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-18 20:02:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:02:51,994 INFO L87 Difference]: Start difference. First operand 525 states and 527 transitions. Second operand has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:54,287 INFO L93 Difference]: Finished difference Result 1185 states and 1227 transitions. [2022-11-18 20:02:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-18 20:02:54,287 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 524 [2022-11-18 20:02:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:54,291 INFO L225 Difference]: With dead ends: 1185 [2022-11-18 20:02:54,292 INFO L226 Difference]: Without dead ends: 1159 [2022-11-18 20:02:54,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:02:54,293 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2468 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2468 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:54,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2468 Valid, 404 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:02:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-18 20:02:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 645. [2022-11-18 20:02:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0046583850931676) internal successors, (647), 644 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 647 transitions. [2022-11-18 20:02:54,350 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 647 transitions. Word has length 524 [2022-11-18 20:02:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:54,351 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 647 transitions. [2022-11-18 20:02:54,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 647 transitions. [2022-11-18 20:02:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2022-11-18 20:02:54,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:54,357 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 78, 78, 78, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:54,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:54,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:02:54,565 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:02:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash -649956327, now seen corresponding path program 11 times [2022-11-18 20:02:54,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:54,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667469971] [2022-11-18 20:02:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:54,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45229 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2022-11-18 20:03:01,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:03:01,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667469971] [2022-11-18 20:03:01,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667469971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:01,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690102642] [2022-11-18 20:03:01,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:03:01,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:03:01,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:03:01,384 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:03:01,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd2a3e9-d4a7-4b80-afac-b4fd1e65841f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process