./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a719405da03132817ea2d2d0b1cf4a57bb1050c6860d4dd23b83fe81ff2289e3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:48:25,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:48:25,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:48:25,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:48:25,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:48:25,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:48:25,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:48:25,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:48:25,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:48:25,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:48:25,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:48:25,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:48:25,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:48:25,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:48:25,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:48:25,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:48:25,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:48:25,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:48:25,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:48:25,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:48:25,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:48:25,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:48:25,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:48:25,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:48:25,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:48:25,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:48:25,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:48:25,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:48:25,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:48:25,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:48:25,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:48:25,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:48:25,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:48:25,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:48:25,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:48:25,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:48:25,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:48:25,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:48:25,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:48:25,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:48:25,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:48:25,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:48:25,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:48:25,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:48:25,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:48:25,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:48:25,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:48:25,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:48:25,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:48:25,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:48:25,246 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:48:25,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:48:25,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:48:25,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:48:25,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:48:25,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:48:25,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:48:25,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:48:25,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:48:25,248 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:48:25,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:48:25,249 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:48:25,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:48:25,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:48:25,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:48:25,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:48:25,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:48:25,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:48:25,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:48:25,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:48:25,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:48:25,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:48:25,253 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:48:25,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:48:25,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:48:25,253 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_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a719405da03132817ea2d2d0b1cf4a57bb1050c6860d4dd23b83fe81ff2289e3 [2022-11-20 11:48:25,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:48:25,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:48:25,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:48:25,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:48:25,597 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:48:25,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-crafted/bAnd2.i [2022-11-20 11:48:28,905 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:48:29,183 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:48:29,184 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/sv-benchmarks/c/array-crafted/bAnd2.i [2022-11-20 11:48:29,197 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/data/1ab459d0d/5cb3521206c14b46b9b18f3a386284bc/FLAG62ca61de5 [2022-11-20 11:48:29,225 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/data/1ab459d0d/5cb3521206c14b46b9b18f3a386284bc [2022-11-20 11:48:29,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:48:29,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:48:29,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:48:29,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:48:29,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:48:29,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87e14a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29, skipping insertion in model container [2022-11-20 11:48:29,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:48:29,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:48:29,480 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/sv-benchmarks/c/array-crafted/bAnd2.i[1296,1309] [2022-11-20 11:48:29,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:48:29,508 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:48:29,537 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/sv-benchmarks/c/array-crafted/bAnd2.i[1296,1309] [2022-11-20 11:48:29,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:48:29,557 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:48:29,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29 WrapperNode [2022-11-20 11:48:29,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:48:29,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:48:29,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:48:29,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:48:29,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,606 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2022-11-20 11:48:29,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:48:29,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:48:29,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:48:29,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:48:29,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,637 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:48:29,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:48:29,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:48:29,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:48:29,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (1/1) ... [2022-11-20 11:48:29,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:48:29,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:29,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:48:29,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:48:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:48:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:48:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:48:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:48:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-11-20 11:48:29,738 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-11-20 11:48:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:48:29,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:48:29,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:48:29,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:48:29,849 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:48:29,852 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:48:30,041 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:48:30,048 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:48:30,049 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:48:30,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:48:30 BoogieIcfgContainer [2022-11-20 11:48:30,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:48:30,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:48:30,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:48:30,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:48:30,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:48:29" (1/3) ... [2022-11-20 11:48:30,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d49226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:48:30, skipping insertion in model container [2022-11-20 11:48:30,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:48:29" (2/3) ... [2022-11-20 11:48:30,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d49226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:48:30, skipping insertion in model container [2022-11-20 11:48:30,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:48:30" (3/3) ... [2022-11-20 11:48:30,061 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2022-11-20 11:48:30,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:48:30,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:48:30,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:48:30,158 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;@5270901f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:48:30,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:48:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:48:30,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:30,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:30,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:30,197 INFO L85 PathProgramCache]: Analyzing trace with hash 877469947, now seen corresponding path program 1 times [2022-11-20 11:48:30,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:30,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863073110] [2022-11-20 11:48:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:30,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:30,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:48:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:30,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:48:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:30,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:48:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:48:30,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863073110] [2022-11-20 11:48:30,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863073110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:30,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38433684] [2022-11-20 11:48:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:30,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:30,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:30,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:48:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:30,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:48:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:48:31,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:31,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38433684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:31,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:48:31,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 11:48:31,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613346421] [2022-11-20 11:48:31,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:31,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:48:31,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:48:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:48:31,088 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:48:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:31,146 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2022-11-20 11:48:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:48:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-20 11:48:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:31,159 INFO L225 Difference]: With dead ends: 56 [2022-11-20 11:48:31,159 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 11:48:31,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:48:31,174 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 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 [2022-11-20 11:48:31,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:48:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 11:48:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-20 11:48:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-20 11:48:31,216 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 28 [2022-11-20 11:48:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:31,216 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-20 11:48:31,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:48:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-20 11:48:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:48:31,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:31,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:31,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 11:48:31,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1350925699, now seen corresponding path program 1 times [2022-11-20 11:48:31,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:31,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534066815] [2022-11-20 11:48:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:31,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:31,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:48:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:31,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:48:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:31,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 11:48:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:48:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534066815] [2022-11-20 11:48:31,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534066815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791321548] [2022-11-20 11:48:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:31,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:31,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:48:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:31,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:48:31,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:48:31,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:31,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791321548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:31,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:48:31,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 11:48:31,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66707545] [2022-11-20 11:48:31,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:31,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:48:31,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:31,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:48:31,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:48:31,717 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:48:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:31,746 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-11-20 11:48:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:48:31,747 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-20 11:48:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:31,748 INFO L225 Difference]: With dead ends: 51 [2022-11-20 11:48:31,748 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 11:48:31,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:48:31,750 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 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 [2022-11-20 11:48:31,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:48:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 11:48:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-11-20 11:48:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-20 11:48:31,758 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 30 [2022-11-20 11:48:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:31,759 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-20 11:48:31,759 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:48:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-20 11:48:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 11:48:31,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:31,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:31,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:31,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:31,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1947812344, now seen corresponding path program 1 times [2022-11-20 11:48:31,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499645842] [2022-11-20 11:48:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:31,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:48:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:48:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:48:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:48:32,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:32,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499645842] [2022-11-20 11:48:32,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499645842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:32,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696251949] [2022-11-20 11:48:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:32,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:32,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:48:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:48:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:48:32,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:32,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696251949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:32,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:48:32,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 11:48:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646978975] [2022-11-20 11:48:32,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:32,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:48:32,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:48:32,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:48:32,450 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:48:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:32,476 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-11-20 11:48:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:48:32,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-11-20 11:48:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:32,481 INFO L225 Difference]: With dead ends: 45 [2022-11-20 11:48:32,481 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 11:48:32,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:48:32,486 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:32,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:48:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 11:48:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-20 11:48:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-20 11:48:32,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 42 [2022-11-20 11:48:32,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:32,504 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-20 11:48:32,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:48:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-20 11:48:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:48:32,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:32,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:32,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:48:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:32,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1366339350, now seen corresponding path program 1 times [2022-11-20 11:48:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:32,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645741846] [2022-11-20 11:48:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:32,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:48:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:48:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:48:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:48:32,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645741846] [2022-11-20 11:48:32,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645741846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999292478] [2022-11-20 11:48:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:32,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:32,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:32,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:32,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:48:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:33,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:48:33,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:48:33,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:48:33,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999292478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:33,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:33,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-20 11:48:33,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531446993] [2022-11-20 11:48:33,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:33,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:48:33,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:48:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:48:33,167 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:48:33,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:33,245 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2022-11-20 11:48:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:48:33,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-20 11:48:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:33,251 INFO L225 Difference]: With dead ends: 66 [2022-11-20 11:48:33,251 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 11:48:33,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:48:33,256 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:33,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 127 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:48:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 11:48:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-11-20 11:48:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-20 11:48:33,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 44 [2022-11-20 11:48:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:33,267 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-20 11:48:33,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:48:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-20 11:48:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:48:33,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:33,270 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:33,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:33,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:33,477 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:33,477 INFO L85 PathProgramCache]: Analyzing trace with hash -242791145, now seen corresponding path program 2 times [2022-11-20 11:48:33,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:33,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8875242] [2022-11-20 11:48:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:33,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 11:48:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 11:48:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:33,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:48:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-20 11:48:33,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:33,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8875242] [2022-11-20 11:48:33,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8875242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:33,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714688716] [2022-11-20 11:48:33,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:33,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:33,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:48:33,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:48:33,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:33,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:48:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-20 11:48:33,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-20 11:48:34,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714688716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:34,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:34,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-20 11:48:34,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657045892] [2022-11-20 11:48:34,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:34,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:48:34,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:48:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:48:34,021 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 11:48:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:34,123 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2022-11-20 11:48:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:48:34,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-20 11:48:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:34,128 INFO L225 Difference]: With dead ends: 82 [2022-11-20 11:48:34,128 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 11:48:34,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:48:34,130 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:34,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:48:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 11:48:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-11-20 11:48:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-20 11:48:34,159 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 62 [2022-11-20 11:48:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:34,159 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-20 11:48:34,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 11:48:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-20 11:48:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 11:48:34,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:34,161 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:34,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:34,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:34,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash 419638721, now seen corresponding path program 3 times [2022-11-20 11:48:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:34,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569351456] [2022-11-20 11:48:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:48:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:34,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 11:48:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:34,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-20 11:48:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-20 11:48:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569351456] [2022-11-20 11:48:34,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569351456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:34,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79333257] [2022-11-20 11:48:34,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:48:34,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:34,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:34,599 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:34,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:48:34,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:48:34,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:48:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-20 11:48:34,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-20 11:48:34,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79333257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:34,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:34,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-20 11:48:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088243157] [2022-11-20 11:48:34,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:34,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:48:34,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:48:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:48:34,862 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:48:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:34,909 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2022-11-20 11:48:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:48:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-11-20 11:48:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:34,911 INFO L225 Difference]: With dead ends: 102 [2022-11-20 11:48:34,911 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 11:48:34,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:48:34,912 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:34,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 142 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:48:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 11:48:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-20 11:48:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-11-20 11:48:34,922 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 76 [2022-11-20 11:48:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:34,922 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-11-20 11:48:34,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:48:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-11-20 11:48:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 11:48:34,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:34,925 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:34,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:35,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:35,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:35,133 INFO L85 PathProgramCache]: Analyzing trace with hash 431095981, now seen corresponding path program 4 times [2022-11-20 11:48:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:35,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751473616] [2022-11-20 11:48:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:35,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:35,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:48:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:35,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-20 11:48:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:35,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-20 11:48:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-20 11:48:35,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:35,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751473616] [2022-11-20 11:48:35,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751473616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:35,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324022705] [2022-11-20 11:48:35,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:48:35,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:35,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:35,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:35,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:48:35,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:48:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:35,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:48:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-20 11:48:35,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-20 11:48:36,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324022705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:36,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:36,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-20 11:48:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666310180] [2022-11-20 11:48:36,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:48:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:48:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:48:36,125 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:48:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:36,242 INFO L93 Difference]: Finished difference Result 147 states and 190 transitions. [2022-11-20 11:48:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:48:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 124 [2022-11-20 11:48:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:36,244 INFO L225 Difference]: With dead ends: 147 [2022-11-20 11:48:36,244 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 11:48:36,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:48:36,246 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:36,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 110 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:48:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 11:48:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-20 11:48:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 92 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:48:36,257 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 124 [2022-11-20 11:48:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:36,257 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:48:36,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:48:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:48:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-20 11:48:36,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:36,260 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:36,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:48:36,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:36,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:36,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:36,467 INFO L85 PathProgramCache]: Analyzing trace with hash -691265083, now seen corresponding path program 5 times [2022-11-20 11:48:36,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:36,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342376244] [2022-11-20 11:48:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:36,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:37,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:48:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:37,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:48:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:37,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-20 11:48:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-20 11:48:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342376244] [2022-11-20 11:48:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342376244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997973378] [2022-11-20 11:48:37,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:48:37,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:37,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:37,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:37,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:48:38,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-20 11:48:38,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:38,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:48:38,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-11-20 11:48:39,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-11-20 11:48:39,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997973378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:39,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:39,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-11-20 11:48:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040687100] [2022-11-20 11:48:39,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:48:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:48:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:48:39,498 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:48:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:39,691 INFO L93 Difference]: Finished difference Result 190 states and 249 transitions. [2022-11-20 11:48:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:48:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 148 [2022-11-20 11:48:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:39,694 INFO L225 Difference]: With dead ends: 190 [2022-11-20 11:48:39,695 INFO L226 Difference]: Without dead ends: 140 [2022-11-20 11:48:39,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:48:39,699 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:39,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 247 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:48:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-20 11:48:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-11-20 11:48:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.2313432835820894) internal successors, (165), 134 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2022-11-20 11:48:39,724 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 148 [2022-11-20 11:48:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:39,726 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2022-11-20 11:48:39,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:48:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2022-11-20 11:48:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-20 11:48:39,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:39,739 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:39,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:39,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:39,947 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:39,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1601774817, now seen corresponding path program 6 times [2022-11-20 11:48:39,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:39,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115570417] [2022-11-20 11:48:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:39,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:41,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 11:48:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:41,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-20 11:48:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:41,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-11-20 11:48:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2022-11-20 11:48:41,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:41,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115570417] [2022-11-20 11:48:41,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115570417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:41,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833207350] [2022-11-20 11:48:41,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:48:41,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:41,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:41,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:41,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:48:41,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 11:48:41,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:48:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2022-11-20 11:48:41,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2022-11-20 11:48:41,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833207350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:41,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:41,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2022-11-20 11:48:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917985015] [2022-11-20 11:48:41,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:41,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:48:41,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:48:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:48:41,588 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:48:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:41,733 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2022-11-20 11:48:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:48:41,734 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2022-11-20 11:48:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:41,739 INFO L225 Difference]: With dead ends: 240 [2022-11-20 11:48:41,739 INFO L226 Difference]: Without dead ends: 150 [2022-11-20 11:48:41,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:48:41,743 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:41,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 225 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:48:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-20 11:48:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-11-20 11:48:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 144 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 181 transitions. [2022-11-20 11:48:41,761 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 181 transitions. Word has length 246 [2022-11-20 11:48:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:41,762 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 181 transitions. [2022-11-20 11:48:41,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:48:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 181 transitions. [2022-11-20 11:48:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-11-20 11:48:41,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:41,766 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:41,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:41,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:41,972 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:41,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1749717095, now seen corresponding path program 7 times [2022-11-20 11:48:41,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:41,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069127913] [2022-11-20 11:48:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:41,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:43,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:48:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:43,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:48:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-11-20 11:48:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-11-20 11:48:43,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069127913] [2022-11-20 11:48:43,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069127913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2847192] [2022-11-20 11:48:43,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:48:43,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:43,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:43,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:43,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:48:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:43,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:48:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-11-20 11:48:43,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-11-20 11:48:44,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2847192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:44,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:44,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-11-20 11:48:44,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966281161] [2022-11-20 11:48:44,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:44,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:48:44,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:48:44,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:48:44,860 INFO L87 Difference]: Start difference. First operand 149 states and 181 transitions. Second operand has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 53 states have internal predecessors, (129), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:48:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:45,090 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2022-11-20 11:48:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 11:48:45,091 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 53 states have internal predecessors, (129), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2022-11-20 11:48:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:45,093 INFO L225 Difference]: With dead ends: 299 [2022-11-20 11:48:45,094 INFO L226 Difference]: Without dead ends: 201 [2022-11-20 11:48:45,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:48:45,096 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:45,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 137 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:48:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-20 11:48:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-20 11:48:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.1581632653061225) internal successors, (227), 196 states have internal predecessors, (227), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2022-11-20 11:48:45,109 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 256 [2022-11-20 11:48:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:45,110 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2022-11-20 11:48:45,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 53 states have internal predecessors, (129), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:48:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2022-11-20 11:48:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-20 11:48:45,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:45,116 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:45,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:45,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:48:45,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1037554253, now seen corresponding path program 8 times [2022-11-20 11:48:45,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:45,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98189174] [2022-11-20 11:48:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:45,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:48,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 11:48:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:48,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-11-20 11:48:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:48,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-11-20 11:48:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-11-20 11:48:48,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:48,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98189174] [2022-11-20 11:48:48,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98189174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:48,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630600569] [2022-11-20 11:48:48,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:48,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:48,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:48,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:48,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:48:48,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:48:48,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:48,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 11:48:48,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-11-20 11:48:49,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-11-20 11:48:53,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630600569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:53,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:53,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2022-11-20 11:48:53,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697039912] [2022-11-20 11:48:53,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:53,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-20 11:48:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-20 11:48:53,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 11:48:53,580 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 105 states, 105 states have (on average 2.219047619047619) internal successors, (233), 105 states have internal predecessors, (233), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:48:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:54,068 INFO L93 Difference]: Finished difference Result 403 states and 518 transitions. [2022-11-20 11:48:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-20 11:48:54,069 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.219047619047619) internal successors, (233), 105 states have internal predecessors, (233), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 308 [2022-11-20 11:48:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:54,072 INFO L225 Difference]: With dead ends: 403 [2022-11-20 11:48:54,072 INFO L226 Difference]: Without dead ends: 305 [2022-11-20 11:48:54,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 11:48:54,078 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:54,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 137 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:48:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-20 11:48:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-11-20 11:48:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.1033333333333333) internal successors, (331), 300 states have internal predecessors, (331), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:48:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 337 transitions. [2022-11-20 11:48:54,094 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 337 transitions. Word has length 308 [2022-11-20 11:48:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:54,096 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 337 transitions. [2022-11-20 11:48:54,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.219047619047619) internal successors, (233), 105 states have internal predecessors, (233), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:48:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 337 transitions. [2022-11-20 11:48:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-20 11:48:54,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:54,106 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:54,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:54,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:54,314 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:48:54,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash -266796619, now seen corresponding path program 9 times [2022-11-20 11:48:54,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:54,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711487474] [2022-11-20 11:48:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:54,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:03,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-11-20 11:49:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2022-11-20 11:49:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2022-11-20 11:49:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-11-20 11:49:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711487474] [2022-11-20 11:49:03,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711487474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736270223] [2022-11-20 11:49:03,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:49:03,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:03,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:03,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:03,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:49:04,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 11:49:04,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:04,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:49:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 12355 trivial. 0 not checked. [2022-11-20 11:49:04,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2022-11-20 11:49:05,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736270223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:05,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:05,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 9, 9] total 119 [2022-11-20 11:49:05,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946308975] [2022-11-20 11:49:05,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:05,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-20 11:49:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-20 11:49:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 11:49:05,491 INFO L87 Difference]: Start difference. First operand 305 states and 337 transitions. Second operand has 119 states, 119 states have (on average 2.226890756302521) internal successors, (265), 119 states have internal predecessors, (265), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:49:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:06,121 INFO L93 Difference]: Finished difference Result 422 states and 494 transitions. [2022-11-20 11:49:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-20 11:49:06,122 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.226890756302521) internal successors, (265), 119 states have internal predecessors, (265), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 412 [2022-11-20 11:49:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:06,124 INFO L225 Difference]: With dead ends: 422 [2022-11-20 11:49:06,124 INFO L226 Difference]: Without dead ends: 324 [2022-11-20 11:49:06,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 816 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 11:49:06,129 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 117 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:06,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 297 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:49:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-20 11:49:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2022-11-20 11:49:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.0974842767295598) internal successors, (349), 318 states have internal predecessors, (349), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:49:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 355 transitions. [2022-11-20 11:49:06,143 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 355 transitions. Word has length 412 [2022-11-20 11:49:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:06,143 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 355 transitions. [2022-11-20 11:49:06,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.226890756302521) internal successors, (265), 119 states have internal predecessors, (265), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:49:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 355 transitions. [2022-11-20 11:49:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-11-20 11:49:06,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:06,153 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:06,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:06,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:49:06,366 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:49:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash -67345881, now seen corresponding path program 10 times [2022-11-20 11:49:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694577292] [2022-11-20 11:49:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:06,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:15,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-11-20 11:49:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:15,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2022-11-20 11:49:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:15,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 365 [2022-11-20 11:49:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-11-20 11:49:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:15,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694577292] [2022-11-20 11:49:15,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694577292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:15,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565625234] [2022-11-20 11:49:15,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:49:15,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:15,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:15,985 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:16,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:49:16,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:49:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-20 11:49:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-11-20 11:49:17,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-11-20 11:49:32,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565625234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:32,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:32,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2022-11-20 11:49:32,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824929748] [2022-11-20 11:49:32,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:32,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2022-11-20 11:49:32,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2022-11-20 11:49:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2022-11-20 11:49:32,208 INFO L87 Difference]: Start difference. First operand 323 states and 355 transitions. Second operand has 211 states, 211 states have (on average 2.109004739336493) internal successors, (445), 211 states have internal predecessors, (445), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:49:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:33,886 INFO L93 Difference]: Finished difference Result 647 states and 815 transitions. [2022-11-20 11:49:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-11-20 11:49:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.109004739336493) internal successors, (445), 211 states have internal predecessors, (445), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 430 [2022-11-20 11:49:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:33,890 INFO L225 Difference]: With dead ends: 647 [2022-11-20 11:49:33,890 INFO L226 Difference]: Without dead ends: 533 [2022-11-20 11:49:33,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2022-11-20 11:49:33,897 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 312 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:33,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 164 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:49:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-20 11:49:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2022-11-20 11:49:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 528 states have (on average 1.058712121212121) internal successors, (559), 528 states have internal predecessors, (559), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:49:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 565 transitions. [2022-11-20 11:49:33,920 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 565 transitions. Word has length 430 [2022-11-20 11:49:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:33,921 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 565 transitions. [2022-11-20 11:49:33,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.109004739336493) internal successors, (445), 211 states have internal predecessors, (445), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:49:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 565 transitions. [2022-11-20 11:49:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-11-20 11:49:33,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:33,943 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:33,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 11:49:34,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:49:34,152 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:49:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1883981305, now seen corresponding path program 11 times [2022-11-20 11:49:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:34,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796938452] [2022-11-20 11:49:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:05,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 419 [2022-11-20 11:50:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2022-11-20 11:50:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:05,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 575 [2022-11-20 11:50:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 47045 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-11-20 11:50:05,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:50:05,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796938452] [2022-11-20 11:50:05,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796938452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:50:05,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331224892] [2022-11-20 11:50:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:50:05,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:05,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:50:05,796 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:50:05,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e269bbe9-64a0-4e87-b2d1-109b75e50ba4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process