./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.1.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.1.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3630f7774dd1856cb2bbedeab3f074753b7f4986b6a106ca4f723a3d5fd78463 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 21:08:05,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:08:05,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:08:05,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:08:05,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:08:05,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:08:05,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:08:05,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:08:05,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:08:05,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:08:05,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:08:05,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:08:05,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:08:05,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:08:05,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:08:05,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:08:05,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:08:05,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:08:05,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:08:05,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:08:05,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:08:05,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:08:05,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:08:05,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:08:05,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:08:05,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:08:05,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:08:05,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:08:05,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:08:05,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:08:05,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:08:05,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:08:05,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:08:05,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:08:05,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:08:05,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:08:05,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:08:05,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:08:05,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:08:05,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:08:05,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:08:05,234 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 21:08:05,257 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:08:05,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:08:05,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:08:05,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:08:05,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:08:05,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:08:05,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:08:05,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:08:05,260 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:08:05,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:08:05,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:08:05,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:08:05,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:08:05,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:08:05,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:08:05,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:08:05,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:08:05,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:08:05,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:08:05,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:08:05,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:08:05,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:08:05,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:08:05,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:08:05,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:08:05,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:08:05,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:08:05,264 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:08:05,264 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:08:05,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:08:05,264 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_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3630f7774dd1856cb2bbedeab3f074753b7f4986b6a106ca4f723a3d5fd78463 [2022-11-18 21:08:05,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:08:05,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:08:05,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:08:05,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:08:05,579 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:08:05,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.1.prop1-back-serstep.c [2022-11-18 21:08:05,639 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/data/efee6ed20/e96e7621828243cea25bfffb3532b0cb/FLAGa06eabbe2 [2022-11-18 21:08:06,304 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:08:06,306 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.1.prop1-back-serstep.c [2022-11-18 21:08:06,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/data/efee6ed20/e96e7621828243cea25bfffb3532b0cb/FLAGa06eabbe2 [2022-11-18 21:08:06,477 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/data/efee6ed20/e96e7621828243cea25bfffb3532b0cb [2022-11-18 21:08:06,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:08:06,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:08:06,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:08:06,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:08:06,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:08:06,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:08:06" (1/1) ... [2022-11-18 21:08:06,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f68a468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:06, skipping insertion in model container [2022-11-18 21:08:06,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:08:06" (1/1) ... [2022-11-18 21:08:06,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:08:06,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:08:06,791 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.1.prop1-back-serstep.c[1014,1027] [2022-11-18 21:08:07,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:08:07,362 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:08:07,373 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.collision.1.prop1-back-serstep.c[1014,1027] [2022-11-18 21:08:07,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:08:07,642 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:08:07,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07 WrapperNode [2022-11-18 21:08:07,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:08:07,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:08:07,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:08:07,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:08:07,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:07,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:07,961 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3761 [2022-11-18 21:08:07,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:08:07,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:08:07,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:08:07,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:08:07,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:07,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:08,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:08,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:08,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:08,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:08,186 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:08,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:08,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:08:08,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:08:08,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:08:08,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:08:08,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (1/1) ... [2022-11-18 21:08:08,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:08:08,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:08,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:08:08,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:08:08,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:08:08,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:08:08,958 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:08:08,961 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:08:13,142 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:08:13,155 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:08:13,156 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 21:08:13,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:08:13 BoogieIcfgContainer [2022-11-18 21:08:13,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:08:13,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:08:13,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:08:13,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:08:13,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:08:06" (1/3) ... [2022-11-18 21:08:13,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ccc463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:08:13, skipping insertion in model container [2022-11-18 21:08:13,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:08:07" (2/3) ... [2022-11-18 21:08:13,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ccc463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:08:13, skipping insertion in model container [2022-11-18 21:08:13,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:08:13" (3/3) ... [2022-11-18 21:08:13,170 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.collision.1.prop1-back-serstep.c [2022-11-18 21:08:13,194 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:08:13,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 21:08:13,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:08:13,296 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;@2adf2684, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:08:13,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 21:08:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 638 states, 636 states have (on average 1.6635220125786163) internal successors, (1058), 637 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-18 21:08:13,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:13,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:13,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash 308854990, now seen corresponding path program 1 times [2022-11-18 21:08:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:13,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013709025] [2022-11-18 21:08:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:14,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:14,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013709025] [2022-11-18 21:08:14,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013709025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:08:14,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:08:14,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:08:14,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739652047] [2022-11-18 21:08:14,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:08:14,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:08:14,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:14,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:08:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:08:14,519 INFO L87 Difference]: Start difference. First operand has 638 states, 636 states have (on average 1.6635220125786163) internal successors, (1058), 637 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:14,980 INFO L93 Difference]: Finished difference Result 2083 states and 3467 transitions. [2022-11-18 21:08:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:08:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-18 21:08:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:15,006 INFO L225 Difference]: With dead ends: 2083 [2022-11-18 21:08:15,007 INFO L226 Difference]: Without dead ends: 1447 [2022-11-18 21:08:15,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:08:15,016 INFO L413 NwaCegarLoop]: 1355 mSDtfsCounter, 3132 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3132 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:15,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3132 Valid, 3008 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:08:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2022-11-18 21:08:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 636. [2022-11-18 21:08:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.6598425196850393) internal successors, (1054), 635 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1054 transitions. [2022-11-18 21:08:15,165 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1054 transitions. Word has length 127 [2022-11-18 21:08:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:15,170 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 1054 transitions. [2022-11-18 21:08:15,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1054 transitions. [2022-11-18 21:08:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-18 21:08:15,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:15,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:08:15,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:15,192 INFO L85 PathProgramCache]: Analyzing trace with hash 986295778, now seen corresponding path program 1 times [2022-11-18 21:08:15,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:15,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030832667] [2022-11-18 21:08:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:16,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030832667] [2022-11-18 21:08:16,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030832667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:08:16,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:08:16,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:08:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865459042] [2022-11-18 21:08:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:08:16,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:08:16,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:08:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:08:16,224 INFO L87 Difference]: Start difference. First operand 636 states and 1054 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:16,599 INFO L93 Difference]: Finished difference Result 2525 states and 4194 transitions. [2022-11-18 21:08:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:08:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-11-18 21:08:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:16,619 INFO L225 Difference]: With dead ends: 2525 [2022-11-18 21:08:16,619 INFO L226 Difference]: Without dead ends: 1891 [2022-11-18 21:08:16,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:08:16,630 INFO L413 NwaCegarLoop]: 1349 mSDtfsCounter, 2710 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2710 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:16,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2710 Valid, 3442 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:08:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-11-18 21:08:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 818. [2022-11-18 21:08:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:08:16,721 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 128 [2022-11-18 21:08:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:16,722 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:08:16,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:08:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-11-18 21:08:16,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:16,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:16,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:08:16,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash -460226687, now seen corresponding path program 1 times [2022-11-18 21:08:16,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:16,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64362733] [2022-11-18 21:08:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:16,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:17,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:17,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156626579] [2022-11-18 21:08:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:17,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:17,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:17,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:17,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:08:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 4564 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 21:08:19,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:22,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 21:08:24,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:24,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64362733] [2022-11-18 21:08:24,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:24,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156626579] [2022-11-18 21:08:24,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156626579] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:24,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:24,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-18 21:08:24,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326872064] [2022-11-18 21:08:24,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:08:24,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:08:24,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:24,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:08:24,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:08:24,406 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:30,184 INFO L93 Difference]: Finished difference Result 4252 states and 6953 transitions. [2022-11-18 21:08:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:08:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 549 [2022-11-18 21:08:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:30,201 INFO L225 Difference]: With dead ends: 4252 [2022-11-18 21:08:30,201 INFO L226 Difference]: Without dead ends: 3618 [2022-11-18 21:08:30,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1089 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:08:30,207 INFO L413 NwaCegarLoop]: 1067 mSDtfsCounter, 4923 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 3944 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4923 SdHoareTripleChecker+Valid, 2875 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 3944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:30,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4923 Valid, 2875 Invalid, 4275 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [331 Valid, 3944 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-18 21:08:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2022-11-18 21:08:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 821. [2022-11-18 21:08:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 1.6585365853658536) internal successors, (1360), 820 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1360 transitions. [2022-11-18 21:08:30,259 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1360 transitions. Word has length 549 [2022-11-18 21:08:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:30,262 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1360 transitions. [2022-11-18 21:08:30,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1360 transitions. [2022-11-18 21:08:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-11-18 21:08:30,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:30,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:30,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:30,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:30,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:30,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash -460167105, now seen corresponding path program 1 times [2022-11-18 21:08:30,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:30,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527574243] [2022-11-18 21:08:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:30,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:30,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:30,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358529338] [2022-11-18 21:08:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:30,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:30,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:30,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:08:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 4564 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 21:08:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 21:08:35,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:35,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527574243] [2022-11-18 21:08:35,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:35,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358529338] [2022-11-18 21:08:35,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358529338] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:35,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:35,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2022-11-18 21:08:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674900425] [2022-11-18 21:08:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:08:35,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:08:35,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:08:35,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:08:35,926 INFO L87 Difference]: Start difference. First operand 821 states and 1360 transitions. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:36,308 INFO L93 Difference]: Finished difference Result 2711 states and 4499 transitions. [2022-11-18 21:08:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:08:36,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 549 [2022-11-18 21:08:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:36,316 INFO L225 Difference]: With dead ends: 2711 [2022-11-18 21:08:36,316 INFO L226 Difference]: Without dead ends: 2074 [2022-11-18 21:08:36,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1091 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:08:36,320 INFO L413 NwaCegarLoop]: 1349 mSDtfsCounter, 3122 mSDsluCounter, 2384 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3122 SdHoareTripleChecker+Valid, 3733 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:36,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3122 Valid, 3733 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:08:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-11-18 21:08:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 818. [2022-11-18 21:08:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:08:36,345 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 549 [2022-11-18 21:08:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:36,346 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:08:36,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:08:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-11-18 21:08:36,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:36,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:36,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:36,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:36,571 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:36,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1592557143, now seen corresponding path program 1 times [2022-11-18 21:08:36,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:36,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66364476] [2022-11-18 21:08:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:36,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:36,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:36,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331404729] [2022-11-18 21:08:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:36,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:36,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:36,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:36,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:08:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:38,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 4567 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-18 21:08:38,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:41,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-18 21:08:44,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:44,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66364476] [2022-11-18 21:08:44,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:44,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331404729] [2022-11-18 21:08:44,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331404729] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:44,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:44,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-18 21:08:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73862737] [2022-11-18 21:08:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:08:44,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:08:44,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:08:44,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:08:44,276 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 6 states, 6 states have (on average 72.16666666666667) internal successors, (433), 6 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:48,935 INFO L93 Difference]: Finished difference Result 3191 states and 5236 transitions. [2022-11-18 21:08:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:08:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 72.16666666666667) internal successors, (433), 6 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 550 [2022-11-18 21:08:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:48,949 INFO L225 Difference]: With dead ends: 3191 [2022-11-18 21:08:48,950 INFO L226 Difference]: Without dead ends: 2555 [2022-11-18 21:08:48,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1091 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:08:48,953 INFO L413 NwaCegarLoop]: 1442 mSDtfsCounter, 4026 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4026 SdHoareTripleChecker+Valid, 3451 SdHoareTripleChecker+Invalid, 4557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:48,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4026 Valid, 3451 Invalid, 4557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-18 21:08:48,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2022-11-18 21:08:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 824. [2022-11-18 21:08:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.6585662211421628) internal successors, (1365), 823 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1365 transitions. [2022-11-18 21:08:48,988 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1365 transitions. Word has length 550 [2022-11-18 21:08:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:48,989 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1365 transitions. [2022-11-18 21:08:48,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.16666666666667) internal successors, (433), 6 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1365 transitions. [2022-11-18 21:08:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-11-18 21:08:49,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:49,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:49,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:49,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:49,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1592497561, now seen corresponding path program 1 times [2022-11-18 21:08:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945134779] [2022-11-18 21:08:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:49,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:49,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097486369] [2022-11-18 21:08:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:49,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:49,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:49,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:49,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:08:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:51,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 4567 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 21:08:51,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:52,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-18 21:08:54,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:54,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945134779] [2022-11-18 21:08:54,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:54,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097486369] [2022-11-18 21:08:54,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097486369] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:54,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:54,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-11-18 21:08:54,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519519817] [2022-11-18 21:08:54,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:08:54,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:08:54,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:08:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:54,665 INFO L87 Difference]: Start difference. First operand 824 states and 1365 transitions. Second operand has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:54,973 INFO L93 Difference]: Finished difference Result 2728 states and 4524 transitions. [2022-11-18 21:08:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:08:54,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 550 [2022-11-18 21:08:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:54,983 INFO L225 Difference]: With dead ends: 2728 [2022-11-18 21:08:54,983 INFO L226 Difference]: Without dead ends: 2086 [2022-11-18 21:08:54,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:08:54,985 INFO L413 NwaCegarLoop]: 1347 mSDtfsCounter, 4170 mSDsluCounter, 3730 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4170 SdHoareTripleChecker+Valid, 5077 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:54,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4170 Valid, 5077 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:08:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2022-11-18 21:08:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 818. [2022-11-18 21:08:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:08:55,013 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 550 [2022-11-18 21:08:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:55,014 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:08:55,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:08:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-11-18 21:08:55,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:55,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:55,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 21:08:55,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:55,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:55,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash -524723673, now seen corresponding path program 1 times [2022-11-18 21:08:55,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:55,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086880469] [2022-11-18 21:08:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:55,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:55,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:55,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420635795] [2022-11-18 21:08:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:55,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:55,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:55,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:08:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 4570 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 21:08:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:00,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-18 21:09:03,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:03,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086880469] [2022-11-18 21:09:03,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420635795] [2022-11-18 21:09:03,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420635795] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:03,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:03,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-18 21:09:03,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514600534] [2022-11-18 21:09:03,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:09:03,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:09:03,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:03,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:09:03,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:09:03,153 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:11,248 INFO L93 Difference]: Finished difference Result 4467 states and 7354 transitions. [2022-11-18 21:09:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:09:11,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 551 [2022-11-18 21:09:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:11,265 INFO L225 Difference]: With dead ends: 4467 [2022-11-18 21:09:11,266 INFO L226 Difference]: Without dead ends: 3828 [2022-11-18 21:09:11,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:09:11,269 INFO L413 NwaCegarLoop]: 1816 mSDtfsCounter, 6125 mSDsluCounter, 3619 mSDsCounter, 0 mSdLazyCounter, 7598 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6125 SdHoareTripleChecker+Valid, 5435 SdHoareTripleChecker+Invalid, 7764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 7598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:11,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6125 Valid, 5435 Invalid, 7764 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 7598 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-18 21:09:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2022-11-18 21:09:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 827. [2022-11-18 21:09:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 1.658595641646489) internal successors, (1370), 826 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1370 transitions. [2022-11-18 21:09:11,309 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1370 transitions. Word has length 551 [2022-11-18 21:09:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:11,311 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1370 transitions. [2022-11-18 21:09:11,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1370 transitions. [2022-11-18 21:09:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-11-18 21:09:11,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:11,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:11,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:11,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 21:09:11,544 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash -524664091, now seen corresponding path program 1 times [2022-11-18 21:09:11,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:11,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898356358] [2022-11-18 21:09:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:11,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:11,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:11,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832768867] [2022-11-18 21:09:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:11,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:11,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:11,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:11,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:09:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:14,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 4570 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-18 21:09:14,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:15,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-18 21:09:17,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898356358] [2022-11-18 21:09:17,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:17,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832768867] [2022-11-18 21:09:17,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832768867] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:17,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:17,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-11-18 21:09:17,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89206990] [2022-11-18 21:09:17,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:09:17,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:09:17,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:09:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:09:17,062 INFO L87 Difference]: Start difference. First operand 827 states and 1370 transitions. Second operand has 6 states, 6 states have (on average 72.66666666666667) internal successors, (436), 6 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:17,499 INFO L93 Difference]: Finished difference Result 2754 states and 4566 transitions. [2022-11-18 21:09:17,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 21:09:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 72.66666666666667) internal successors, (436), 6 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 551 [2022-11-18 21:09:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:17,509 INFO L225 Difference]: With dead ends: 2754 [2022-11-18 21:09:17,510 INFO L226 Difference]: Without dead ends: 2106 [2022-11-18 21:09:17,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:09:17,512 INFO L413 NwaCegarLoop]: 1345 mSDtfsCounter, 5227 mSDsluCounter, 5074 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5227 SdHoareTripleChecker+Valid, 6419 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:17,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5227 Valid, 6419 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:09:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2022-11-18 21:09:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 818. [2022-11-18 21:09:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:09:17,537 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 551 [2022-11-18 21:09:17,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:17,538 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:09:17,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.66666666666667) internal successors, (436), 6 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:09:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2022-11-18 21:09:17,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:17,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:17,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:17,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:17,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1838440197, now seen corresponding path program 1 times [2022-11-18 21:09:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:17,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863608226] [2022-11-18 21:09:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:17,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:17,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:17,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646307613] [2022-11-18 21:09:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:17,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:17,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:17,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:18,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:09:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:20,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 4573 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 21:09:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:22,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-18 21:09:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:25,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863608226] [2022-11-18 21:09:25,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646307613] [2022-11-18 21:09:25,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646307613] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:25,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:25,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2022-11-18 21:09:25,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109301357] [2022-11-18 21:09:25,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:09:25,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 21:09:25,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 21:09:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:09:25,900 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 8 states, 8 states have (on average 54.875) internal successors, (439), 8 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:34,974 INFO L93 Difference]: Finished difference Result 4503 states and 7414 transitions. [2022-11-18 21:09:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 21:09:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 54.875) internal successors, (439), 8 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 552 [2022-11-18 21:09:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:34,987 INFO L225 Difference]: With dead ends: 4503 [2022-11-18 21:09:34,988 INFO L226 Difference]: Without dead ends: 3861 [2022-11-18 21:09:34,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:09:34,991 INFO L413 NwaCegarLoop]: 1809 mSDtfsCounter, 7732 mSDsluCounter, 4943 mSDsCounter, 0 mSdLazyCounter, 10064 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7732 SdHoareTripleChecker+Valid, 6752 SdHoareTripleChecker+Invalid, 10230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 10064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:34,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7732 Valid, 6752 Invalid, 10230 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 10064 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-18 21:09:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2022-11-18 21:09:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 830. [2022-11-18 21:09:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.6586248492159228) internal successors, (1375), 829 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1375 transitions. [2022-11-18 21:09:35,026 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1375 transitions. Word has length 552 [2022-11-18 21:09:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:35,027 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 1375 transitions. [2022-11-18 21:09:35,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 54.875) internal successors, (439), 8 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1375 transitions. [2022-11-18 21:09:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2022-11-18 21:09:35,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:35,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:35,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 21:09:35,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:35,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:35,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1838499779, now seen corresponding path program 1 times [2022-11-18 21:09:35,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:35,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862540913] [2022-11-18 21:09:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:35,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:35,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692597140] [2022-11-18 21:09:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:35,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:35,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:35,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:35,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 21:09:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 4573 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-18 21:09:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:39,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-18 21:09:40,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:40,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862540913] [2022-11-18 21:09:40,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:40,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692597140] [2022-11-18 21:09:40,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692597140] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:40,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:40,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2022-11-18 21:09:40,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101180915] [2022-11-18 21:09:40,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:09:40,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:09:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:40,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:09:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:09:40,632 INFO L87 Difference]: Start difference. First operand 830 states and 1375 transitions. Second operand has 7 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:41,118 INFO L93 Difference]: Finished difference Result 2784 states and 4616 transitions. [2022-11-18 21:09:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 21:09:41,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 552 [2022-11-18 21:09:41,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:41,124 INFO L225 Difference]: With dead ends: 2784 [2022-11-18 21:09:41,125 INFO L226 Difference]: Without dead ends: 2130 [2022-11-18 21:09:41,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1121 GetRequests, 1099 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:09:41,127 INFO L413 NwaCegarLoop]: 1343 mSDtfsCounter, 6289 mSDsluCounter, 6416 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6289 SdHoareTripleChecker+Valid, 7759 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:41,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6289 Valid, 7759 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:09:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2022-11-18 21:09:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 818. [2022-11-18 21:09:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:09:41,151 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 552 [2022-11-18 21:09:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:41,151 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:09:41,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:09:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2022-11-18 21:09:41,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:41,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:41,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:41,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 21:09:41,381 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:41,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1462983729, now seen corresponding path program 1 times [2022-11-18 21:09:41,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:41,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858928774] [2022-11-18 21:09:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:41,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:41,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:41,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321906518] [2022-11-18 21:09:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:41,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:41,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:41,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 21:09:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 4576 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 21:09:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:46,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-18 21:09:48,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:48,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858928774] [2022-11-18 21:09:48,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:48,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321906518] [2022-11-18 21:09:48,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321906518] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:48,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:48,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-11-18 21:09:48,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235616498] [2022-11-18 21:09:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:09:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 21:09:48,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:48,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 21:09:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:09:48,736 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 9 states, 9 states have (on average 49.111111111111114) internal successors, (442), 9 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:59,027 INFO L93 Difference]: Finished difference Result 4539 states and 7474 transitions. [2022-11-18 21:09:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 21:09:59,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 49.111111111111114) internal successors, (442), 9 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 553 [2022-11-18 21:09:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:59,038 INFO L225 Difference]: With dead ends: 4539 [2022-11-18 21:09:59,038 INFO L226 Difference]: Without dead ends: 3894 [2022-11-18 21:09:59,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1138 GetRequests, 1104 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 21:09:59,042 INFO L413 NwaCegarLoop]: 1802 mSDtfsCounter, 9841 mSDsluCounter, 6171 mSDsCounter, 0 mSdLazyCounter, 11966 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9841 SdHoareTripleChecker+Valid, 7973 SdHoareTripleChecker+Invalid, 12132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 11966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9841 Valid, 7973 Invalid, 12132 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 11966 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-18 21:09:59,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2022-11-18 21:09:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 833. [2022-11-18 21:09:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 1.6586538461538463) internal successors, (1380), 832 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1380 transitions. [2022-11-18 21:09:59,082 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1380 transitions. Word has length 553 [2022-11-18 21:09:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:59,083 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1380 transitions. [2022-11-18 21:09:59,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 49.111111111111114) internal successors, (442), 9 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1380 transitions. [2022-11-18 21:09:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2022-11-18 21:09:59,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:59,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:59,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:59,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:59,303 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1462924147, now seen corresponding path program 1 times [2022-11-18 21:09:59,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:59,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219381273] [2022-11-18 21:09:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:59,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:59,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:59,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754524568] [2022-11-18 21:09:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:59,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:59,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:59,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:10:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:02,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 4576 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 21:10:02,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-18 21:10:05,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:05,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219381273] [2022-11-18 21:10:05,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:10:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754524568] [2022-11-18 21:10:05,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754524568] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:05,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:05,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2022-11-18 21:10:05,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785153186] [2022-11-18 21:10:05,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:05,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 21:10:05,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:05,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 21:10:05,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:10:05,568 INFO L87 Difference]: Start difference. First operand 833 states and 1380 transitions. Second operand has 8 states, 8 states have (on average 55.25) internal successors, (442), 8 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:06,322 INFO L93 Difference]: Finished difference Result 2814 states and 4666 transitions. [2022-11-18 21:10:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 21:10:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 55.25) internal successors, (442), 8 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 553 [2022-11-18 21:10:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:06,327 INFO L225 Difference]: With dead ends: 2814 [2022-11-18 21:10:06,328 INFO L226 Difference]: Without dead ends: 2154 [2022-11-18 21:10:06,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1129 GetRequests, 1102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:10:06,330 INFO L413 NwaCegarLoop]: 1341 mSDtfsCounter, 7356 mSDsluCounter, 7756 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7356 SdHoareTripleChecker+Valid, 9097 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:06,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7356 Valid, 9097 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:10:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-11-18 21:10:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 818. [2022-11-18 21:10:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:10:06,353 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 553 [2022-11-18 21:10:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:06,353 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:10:06,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 55.25) internal successors, (442), 8 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:10:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-11-18 21:10:06,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:06,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:06,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:06,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 21:10:06,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash 51141983, now seen corresponding path program 1 times [2022-11-18 21:10:06,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:06,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043474708] [2022-11-18 21:10:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:06,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:10:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991554901] [2022-11-18 21:10:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:06,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:06,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:06,800 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:06,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 21:10:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:09,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 4579 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 21:10:09,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:11,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-18 21:10:15,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043474708] [2022-11-18 21:10:15,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:10:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991554901] [2022-11-18 21:10:15,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991554901] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:15,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:15,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2022-11-18 21:10:15,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071773297] [2022-11-18 21:10:15,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:15,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:15,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:15,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:15,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:10:15,040 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 10 states, 10 states have (on average 44.5) internal successors, (445), 10 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:25,859 INFO L93 Difference]: Finished difference Result 4575 states and 7534 transitions. [2022-11-18 21:10:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 21:10:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 44.5) internal successors, (445), 10 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 554 [2022-11-18 21:10:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:25,866 INFO L225 Difference]: With dead ends: 4575 [2022-11-18 21:10:25,866 INFO L226 Difference]: Without dead ends: 3927 [2022-11-18 21:10:25,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1108 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 21:10:25,870 INFO L413 NwaCegarLoop]: 1795 mSDtfsCounter, 12452 mSDsluCounter, 7300 mSDsCounter, 0 mSdLazyCounter, 13283 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12452 SdHoareTripleChecker+Valid, 9095 SdHoareTripleChecker+Invalid, 13449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 13283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:25,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12452 Valid, 9095 Invalid, 13449 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 13283 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-18 21:10:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2022-11-18 21:10:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 836. [2022-11-18 21:10:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 1.658682634730539) internal successors, (1385), 835 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1385 transitions. [2022-11-18 21:10:25,904 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1385 transitions. Word has length 554 [2022-11-18 21:10:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:25,904 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 1385 transitions. [2022-11-18 21:10:25,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.5) internal successors, (445), 10 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1385 transitions. [2022-11-18 21:10:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-11-18 21:10:25,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:25,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:25,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:26,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 21:10:26,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:26,123 INFO L85 PathProgramCache]: Analyzing trace with hash 51201565, now seen corresponding path program 1 times [2022-11-18 21:10:26,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:26,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419706815] [2022-11-18 21:10:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:26,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:26,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:10:26,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74554326] [2022-11-18 21:10:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:26,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:26,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:26,356 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:26,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 21:10:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:29,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 4579 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-18 21:10:29,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:30,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-18 21:10:32,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:32,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419706815] [2022-11-18 21:10:32,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:10:32,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74554326] [2022-11-18 21:10:32,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74554326] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:32,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:32,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-18 21:10:32,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281218572] [2022-11-18 21:10:32,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:32,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 21:10:32,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 21:10:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:10:32,390 INFO L87 Difference]: Start difference. First operand 836 states and 1385 transitions. Second operand has 9 states, 9 states have (on average 49.44444444444444) internal successors, (445), 9 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:33,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:33,283 INFO L93 Difference]: Finished difference Result 2844 states and 4716 transitions. [2022-11-18 21:10:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 21:10:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 49.44444444444444) internal successors, (445), 9 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 554 [2022-11-18 21:10:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:33,290 INFO L225 Difference]: With dead ends: 2844 [2022-11-18 21:10:33,291 INFO L226 Difference]: Without dead ends: 2178 [2022-11-18 21:10:33,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 21:10:33,294 INFO L413 NwaCegarLoop]: 1339 mSDtfsCounter, 8428 mSDsluCounter, 9094 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8428 SdHoareTripleChecker+Valid, 10433 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:33,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8428 Valid, 10433 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:10:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2022-11-18 21:10:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 818. [2022-11-18 21:10:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:10:33,322 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 554 [2022-11-18 21:10:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:33,323 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:10:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 49.44444444444444) internal successors, (445), 9 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:10:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-11-18 21:10:33,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:33,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:33,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 21:10:33,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 21:10:33,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1511382411, now seen corresponding path program 1 times [2022-11-18 21:10:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:33,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47469922] [2022-11-18 21:10:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:33,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:33,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:10:33,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006630014] [2022-11-18 21:10:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:33,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:33,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 21:10:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:37,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 4582 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 21:10:37,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:39,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 21:10:43,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:43,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47469922] [2022-11-18 21:10:43,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:10:43,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006630014] [2022-11-18 21:10:43,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006630014] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:43,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:43,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2022-11-18 21:10:43,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55940648] [2022-11-18 21:10:43,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:10:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:10:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:10:43,730 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 11 states, 11 states have (on average 40.72727272727273) internal successors, (448), 11 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:58,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:58,979 INFO L93 Difference]: Finished difference Result 4611 states and 7594 transitions. [2022-11-18 21:10:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 21:10:58,980 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 40.72727272727273) internal successors, (448), 11 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 555 [2022-11-18 21:10:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:58,989 INFO L225 Difference]: With dead ends: 4611 [2022-11-18 21:10:58,989 INFO L226 Difference]: Without dead ends: 3960 [2022-11-18 21:10:58,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 1112 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 21:10:58,993 INFO L413 NwaCegarLoop]: 1788 mSDtfsCounter, 14571 mSDsluCounter, 8523 mSDsCounter, 0 mSdLazyCounter, 15182 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14571 SdHoareTripleChecker+Valid, 10311 SdHoareTripleChecker+Invalid, 15348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 15182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:58,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14571 Valid, 10311 Invalid, 15348 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 15182 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2022-11-18 21:10:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2022-11-18 21:10:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 839. [2022-11-18 21:10:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 1.6587112171837708) internal successors, (1390), 838 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1390 transitions. [2022-11-18 21:10:59,030 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1390 transitions. Word has length 555 [2022-11-18 21:10:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:59,031 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1390 transitions. [2022-11-18 21:10:59,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 40.72727272727273) internal successors, (448), 11 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1390 transitions. [2022-11-18 21:10:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-11-18 21:10:59,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:59,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:59,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:59,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 21:10:59,256 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:59,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1511322829, now seen corresponding path program 1 times [2022-11-18 21:10:59,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:59,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860674732] [2022-11-18 21:10:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:59,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:59,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:10:59,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841863971] [2022-11-18 21:10:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:59,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:59,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:59,496 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:59,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 21:11:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:02,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 4582 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 21:11:02,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:03,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 21:11:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:05,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860674732] [2022-11-18 21:11:05,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:11:05,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841863971] [2022-11-18 21:11:05,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841863971] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:05,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:05,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2022-11-18 21:11:05,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646243700] [2022-11-18 21:11:05,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:05,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:05,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:11:05,265 INFO L87 Difference]: Start difference. First operand 839 states and 1390 transitions. Second operand has 10 states, 10 states have (on average 44.8) internal successors, (448), 10 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:06,116 INFO L93 Difference]: Finished difference Result 2874 states and 4766 transitions. [2022-11-18 21:11:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 21:11:06,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 44.8) internal successors, (448), 10 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 555 [2022-11-18 21:11:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:06,122 INFO L225 Difference]: With dead ends: 2874 [2022-11-18 21:11:06,122 INFO L226 Difference]: Without dead ends: 2202 [2022-11-18 21:11:06,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1145 GetRequests, 1108 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 21:11:06,124 INFO L413 NwaCegarLoop]: 1337 mSDtfsCounter, 9505 mSDsluCounter, 10430 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9505 SdHoareTripleChecker+Valid, 11767 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:06,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9505 Valid, 11767 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:11:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2022-11-18 21:11:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 818. [2022-11-18 21:11:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:11:06,146 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 555 [2022-11-18 21:11:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:06,147 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:11:06,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.8) internal successors, (448), 10 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:11:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-11-18 21:11:06,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:06,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:06,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:06,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:06,367 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash -82361413, now seen corresponding path program 1 times [2022-11-18 21:11:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:06,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142675151] [2022-11-18 21:11:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:06,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:06,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430146924] [2022-11-18 21:11:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:06,582 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:06,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 21:11:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 4585 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-18 21:11:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:12,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-18 21:11:15,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142675151] [2022-11-18 21:11:15,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:11:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430146924] [2022-11-18 21:11:15,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430146924] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:15,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:15,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2022-11-18 21:11:15,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931813341] [2022-11-18 21:11:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:11:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:11:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-11-18 21:11:15,602 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 12 states, 12 states have (on average 37.583333333333336) internal successors, (451), 12 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:29,851 INFO L93 Difference]: Finished difference Result 4647 states and 7654 transitions. [2022-11-18 21:11:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 21:11:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 37.583333333333336) internal successors, (451), 12 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 556 [2022-11-18 21:11:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:29,858 INFO L225 Difference]: With dead ends: 4647 [2022-11-18 21:11:29,858 INFO L226 Difference]: Without dead ends: 3993 [2022-11-18 21:11:29,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 1116 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=457, Invalid=2405, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 21:11:29,861 INFO L413 NwaCegarLoop]: 1781 mSDtfsCounter, 16198 mSDsluCounter, 9843 mSDsCounter, 0 mSdLazyCounter, 17684 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16198 SdHoareTripleChecker+Valid, 11624 SdHoareTripleChecker+Invalid, 17850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 17684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:29,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16198 Valid, 11624 Invalid, 17850 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 17684 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2022-11-18 21:11:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2022-11-18 21:11:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 842. [2022-11-18 21:11:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.6587395957193818) internal successors, (1395), 841 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1395 transitions. [2022-11-18 21:11:29,893 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1395 transitions. Word has length 556 [2022-11-18 21:11:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:29,894 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1395 transitions. [2022-11-18 21:11:29,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.583333333333336) internal successors, (451), 12 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1395 transitions. [2022-11-18 21:11:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-11-18 21:11:29,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:29,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:29,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-18 21:11:30,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 21:11:30,115 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash -82301831, now seen corresponding path program 1 times [2022-11-18 21:11:30,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:30,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562215318] [2022-11-18 21:11:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:30,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:30,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:30,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021391676] [2022-11-18 21:11:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:30,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:30,307 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:30,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 21:11:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:33,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 4585 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-18 21:11:33,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:34,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-18 21:11:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562215318] [2022-11-18 21:11:36,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:11:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021391676] [2022-11-18 21:11:36,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021391676] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:36,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:36,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2022-11-18 21:11:36,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621442695] [2022-11-18 21:11:36,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:36,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:11:36,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:36,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:11:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:11:36,924 INFO L87 Difference]: Start difference. First operand 842 states and 1395 transitions. Second operand has 11 states, 11 states have (on average 41.0) internal successors, (451), 11 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:38,085 INFO L93 Difference]: Finished difference Result 2904 states and 4816 transitions. [2022-11-18 21:11:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 21:11:38,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 41.0) internal successors, (451), 11 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 556 [2022-11-18 21:11:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:38,089 INFO L225 Difference]: With dead ends: 2904 [2022-11-18 21:11:38,089 INFO L226 Difference]: Without dead ends: 2226 [2022-11-18 21:11:38,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1153 GetRequests, 1111 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 21:11:38,091 INFO L413 NwaCegarLoop]: 1335 mSDtfsCounter, 10587 mSDsluCounter, 11764 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10587 SdHoareTripleChecker+Valid, 13099 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:38,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10587 Valid, 13099 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:11:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-11-18 21:11:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 818. [2022-11-18 21:11:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:11:38,113 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 556 [2022-11-18 21:11:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:38,113 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:11:38,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.0) internal successors, (451), 11 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:11:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-11-18 21:11:38,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:38,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:38,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:38,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 21:11:38,347 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:38,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1352442595, now seen corresponding path program 1 times [2022-11-18 21:11:38,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:38,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594258598] [2022-11-18 21:11:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:38,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:38,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:38,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255875070] [2022-11-18 21:11:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:38,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:38,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:38,538 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:38,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 21:11:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 4588 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-18 21:11:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:43,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-18 21:11:47,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:47,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594258598] [2022-11-18 21:11:47,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:11:47,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255875070] [2022-11-18 21:11:47,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255875070] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:47,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:47,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2022-11-18 21:11:47,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710257511] [2022-11-18 21:11:47,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:47,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:11:47,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:11:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:11:47,666 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 13 states, 13 states have (on average 34.92307692307692) internal successors, (454), 13 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:03,137 INFO L93 Difference]: Finished difference Result 4683 states and 7714 transitions. [2022-11-18 21:12:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 21:12:03,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 34.92307692307692) internal successors, (454), 13 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 557 [2022-11-18 21:12:03,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:03,147 INFO L225 Difference]: With dead ends: 4683 [2022-11-18 21:12:03,148 INFO L226 Difference]: Without dead ends: 4026 [2022-11-18 21:12:03,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1178 GetRequests, 1120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=557, Invalid=2983, Unknown=0, NotChecked=0, Total=3540 [2022-11-18 21:12:03,152 INFO L413 NwaCegarLoop]: 1774 mSDtfsCounter, 18824 mSDsluCounter, 10963 mSDsCounter, 0 mSdLazyCounter, 18986 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18824 SdHoareTripleChecker+Valid, 12737 SdHoareTripleChecker+Invalid, 19152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 18986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:03,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18824 Valid, 12737 Invalid, 19152 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 18986 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2022-11-18 21:12:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-11-18 21:12:03,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 845. [2022-11-18 21:12:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.6587677725118484) internal successors, (1400), 844 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1400 transitions. [2022-11-18 21:12:03,183 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1400 transitions. Word has length 557 [2022-11-18 21:12:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:03,184 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 1400 transitions. [2022-11-18 21:12:03,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 34.92307692307692) internal successors, (454), 13 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1400 transitions. [2022-11-18 21:12:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-11-18 21:12:03,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:03,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:03,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:03,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:03,410 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1352383013, now seen corresponding path program 1 times [2022-11-18 21:12:03,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:03,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242068274] [2022-11-18 21:12:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:03,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:03,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:12:03,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65373026] [2022-11-18 21:12:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:03,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:03,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:03,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:03,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 21:12:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 4588 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-18 21:12:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:08,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-18 21:12:10,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242068274] [2022-11-18 21:12:10,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65373026] [2022-11-18 21:12:10,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65373026] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:10,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:10,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 24 [2022-11-18 21:12:10,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979828869] [2022-11-18 21:12:10,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:12:10,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:12:10,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:12:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:12:10,570 INFO L87 Difference]: Start difference. First operand 845 states and 1400 transitions. Second operand has 12 states, 12 states have (on average 37.833333333333336) internal successors, (454), 12 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:11,959 INFO L93 Difference]: Finished difference Result 2934 states and 4866 transitions. [2022-11-18 21:12:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 21:12:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 37.833333333333336) internal successors, (454), 12 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 557 [2022-11-18 21:12:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:11,963 INFO L225 Difference]: With dead ends: 2934 [2022-11-18 21:12:11,963 INFO L226 Difference]: Without dead ends: 2250 [2022-11-18 21:12:11,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1161 GetRequests, 1114 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 21:12:11,965 INFO L413 NwaCegarLoop]: 1333 mSDtfsCounter, 11674 mSDsluCounter, 13096 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11674 SdHoareTripleChecker+Valid, 14429 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:11,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11674 Valid, 14429 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:12:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2022-11-18 21:12:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 818. [2022-11-18 21:12:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:12:11,983 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 557 [2022-11-18 21:12:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:11,984 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:12:11,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.833333333333336) internal successors, (454), 12 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:12:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-18 21:12:11,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:11,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:12,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-18 21:12:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:12,215 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1869151765, now seen corresponding path program 1 times [2022-11-18 21:12:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247665044] [2022-11-18 21:12:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:12,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:12:12,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771663293] [2022-11-18 21:12:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:12,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:12,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:12,428 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:12,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 21:12:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 4591 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-18 21:12:15,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:18,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-18 21:12:21,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:21,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247665044] [2022-11-18 21:12:21,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:21,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771663293] [2022-11-18 21:12:21,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771663293] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:21,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:21,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 29 [2022-11-18 21:12:21,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699970531] [2022-11-18 21:12:21,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:12:21,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:12:21,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:21,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:12:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:12:21,574 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 14 states, 14 states have (on average 32.642857142857146) internal successors, (457), 14 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:38,816 INFO L93 Difference]: Finished difference Result 4719 states and 7774 transitions. [2022-11-18 21:12:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 21:12:38,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 32.642857142857146) internal successors, (457), 14 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 558 [2022-11-18 21:12:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:38,820 INFO L225 Difference]: With dead ends: 4719 [2022-11-18 21:12:38,820 INFO L226 Difference]: Without dead ends: 4059 [2022-11-18 21:12:38,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1124 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=667, Invalid=3623, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 21:12:38,823 INFO L413 NwaCegarLoop]: 1767 mSDtfsCounter, 20461 mSDsluCounter, 12281 mSDsCounter, 0 mSdLazyCounter, 21506 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20461 SdHoareTripleChecker+Valid, 14048 SdHoareTripleChecker+Invalid, 21672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 21506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:38,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20461 Valid, 14048 Invalid, 21672 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 21506 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2022-11-18 21:12:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2022-11-18 21:12:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 848. [2022-11-18 21:12:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 1.6587957497048407) internal successors, (1405), 847 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1405 transitions. [2022-11-18 21:12:38,850 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1405 transitions. Word has length 558 [2022-11-18 21:12:38,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:38,851 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1405 transitions. [2022-11-18 21:12:38,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.642857142857146) internal successors, (457), 14 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1405 transitions. [2022-11-18 21:12:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-18 21:12:38,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:38,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:38,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:39,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 21:12:39,074 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1869211347, now seen corresponding path program 1 times [2022-11-18 21:12:39,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:39,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385009115] [2022-11-18 21:12:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:39,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:39,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:12:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738611417] [2022-11-18 21:12:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:39,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:39,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:39,267 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:39,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 21:12:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:42,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 4591 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-18 21:12:42,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:44,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-18 21:12:46,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:46,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385009115] [2022-11-18 21:12:46,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:46,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738611417] [2022-11-18 21:12:46,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738611417] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:46,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:46,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2022-11-18 21:12:46,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169925929] [2022-11-18 21:12:46,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:12:46,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:12:46,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:46,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:12:46,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2022-11-18 21:12:46,837 INFO L87 Difference]: Start difference. First operand 848 states and 1405 transitions. Second operand has 13 states, 13 states have (on average 35.15384615384615) internal successors, (457), 13 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:48,546 INFO L93 Difference]: Finished difference Result 2964 states and 4916 transitions. [2022-11-18 21:12:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 21:12:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 35.15384615384615) internal successors, (457), 13 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 558 [2022-11-18 21:12:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:48,549 INFO L225 Difference]: With dead ends: 2964 [2022-11-18 21:12:48,550 INFO L226 Difference]: Without dead ends: 2274 [2022-11-18 21:12:48,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1169 GetRequests, 1117 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 21:12:48,552 INFO L413 NwaCegarLoop]: 1331 mSDtfsCounter, 12766 mSDsluCounter, 14426 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12766 SdHoareTripleChecker+Valid, 15757 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:48,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12766 Valid, 15757 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:12:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2022-11-18 21:12:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 818. [2022-11-18 21:12:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:12:48,568 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 558 [2022-11-18 21:12:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:48,569 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:12:48,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 35.15384615384615) internal successors, (457), 13 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:12:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-11-18 21:12:48,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:48,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:48,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:48,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 21:12:48,787 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:48,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1797390275, now seen corresponding path program 1 times [2022-11-18 21:12:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:48,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192358997] [2022-11-18 21:12:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:48,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:12:48,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146565272] [2022-11-18 21:12:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:48,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:48,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:48,999 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:49,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 21:12:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 4594 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-18 21:12:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:54,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 21:12:58,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192358997] [2022-11-18 21:12:58,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146565272] [2022-11-18 21:12:58,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146565272] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:58,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:58,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [18] total 31 [2022-11-18 21:12:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875374251] [2022-11-18 21:12:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:12:58,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:12:58,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:12:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-11-18 21:12:58,535 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 15 states, 15 states have (on average 30.666666666666668) internal successors, (460), 15 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:18,157 INFO L93 Difference]: Finished difference Result 4755 states and 7834 transitions. [2022-11-18 21:13:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 21:13:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 30.666666666666668) internal successors, (460), 15 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 559 [2022-11-18 21:13:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:18,162 INFO L225 Difference]: With dead ends: 4755 [2022-11-18 21:13:18,162 INFO L226 Difference]: Without dead ends: 4092 [2022-11-18 21:13:18,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 1128 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=787, Invalid=4325, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 21:13:18,164 INFO L413 NwaCegarLoop]: 1760 mSDtfsCounter, 22600 mSDsluCounter, 13497 mSDsCounter, 0 mSdLazyCounter, 23420 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22600 SdHoareTripleChecker+Valid, 15257 SdHoareTripleChecker+Invalid, 23586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 23420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:18,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22600 Valid, 15257 Invalid, 23586 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 23420 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2022-11-18 21:13:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2022-11-18 21:13:18,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 851. [2022-11-18 21:13:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.6588235294117648) internal successors, (1410), 850 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1410 transitions. [2022-11-18 21:13:18,191 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1410 transitions. Word has length 559 [2022-11-18 21:13:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:18,192 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1410 transitions. [2022-11-18 21:13:18,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.666666666666668) internal successors, (460), 15 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1410 transitions. [2022-11-18 21:13:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-11-18 21:13:18,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:18,198 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:18,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:18,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:18,423 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:13:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:18,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1797449857, now seen corresponding path program 1 times [2022-11-18 21:13:18,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:13:18,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278475631] [2022-11-18 21:13:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:18,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:13:18,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:13:18,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931657535] [2022-11-18 21:13:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:18,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:18,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:13:18,639 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:13:18,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 21:13:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:22,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 4594 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-18 21:13:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:13:23,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 21:13:25,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:13:25,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278475631] [2022-11-18 21:13:25,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:13:25,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931657535] [2022-11-18 21:13:25,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931657535] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:13:25,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:13:25,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 28 [2022-11-18 21:13:25,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181679911] [2022-11-18 21:13:25,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:25,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:13:25,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:13:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:13:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2022-11-18 21:13:25,717 INFO L87 Difference]: Start difference. First operand 851 states and 1410 transitions. Second operand has 14 states, 14 states have (on average 32.857142857142854) internal successors, (460), 14 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:27,578 INFO L93 Difference]: Finished difference Result 2994 states and 4966 transitions. [2022-11-18 21:13:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 21:13:27,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 32.857142857142854) internal successors, (460), 14 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 559 [2022-11-18 21:13:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:27,581 INFO L225 Difference]: With dead ends: 2994 [2022-11-18 21:13:27,581 INFO L226 Difference]: Without dead ends: 2298 [2022-11-18 21:13:27,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1177 GetRequests, 1120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=544, Invalid=2878, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 21:13:27,583 INFO L413 NwaCegarLoop]: 1329 mSDtfsCounter, 13863 mSDsluCounter, 15754 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13863 SdHoareTripleChecker+Valid, 17083 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:27,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13863 Valid, 17083 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:13:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-11-18 21:13:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 818. [2022-11-18 21:13:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:13:27,599 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 559 [2022-11-18 21:13:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:27,600 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:13:27,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.857142857142854) internal successors, (460), 14 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:13:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2022-11-18 21:13:27,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:27,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:27,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:27,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:27,819 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:13:27,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:27,819 INFO L85 PathProgramCache]: Analyzing trace with hash 979823985, now seen corresponding path program 1 times [2022-11-18 21:13:27,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:13:27,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973403632] [2022-11-18 21:13:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:27,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:13:28,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:13:28,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342026628] [2022-11-18 21:13:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:28,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:28,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:13:28,015 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:13:28,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 21:13:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 4597 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-18 21:13:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:13:34,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 21:13:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:13:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973403632] [2022-11-18 21:13:38,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:13:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342026628] [2022-11-18 21:13:38,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342026628] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:13:38,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:13:38,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [19] total 33 [2022-11-18 21:13:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611731820] [2022-11-18 21:13:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:38,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:13:38,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:13:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:13:38,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 21:13:38,102 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 16 states, 16 states have (on average 28.9375) internal successors, (463), 16 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:58,804 INFO L93 Difference]: Finished difference Result 4791 states and 7894 transitions. [2022-11-18 21:13:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-18 21:13:58,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 28.9375) internal successors, (463), 16 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 560 [2022-11-18 21:13:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:58,808 INFO L225 Difference]: With dead ends: 4791 [2022-11-18 21:13:58,808 INFO L226 Difference]: Without dead ends: 4125 [2022-11-18 21:13:58,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=917, Invalid=5089, Unknown=0, NotChecked=0, Total=6006 [2022-11-18 21:13:58,811 INFO L413 NwaCegarLoop]: 1753 mSDtfsCounter, 25241 mSDsluCounter, 14608 mSDsCounter, 0 mSdLazyCounter, 24707 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25241 SdHoareTripleChecker+Valid, 16361 SdHoareTripleChecker+Invalid, 24873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 24707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:58,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25241 Valid, 16361 Invalid, 24873 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [166 Valid, 24707 Invalid, 0 Unknown, 0 Unchecked, 17.8s Time] [2022-11-18 21:13:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2022-11-18 21:13:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 854. [2022-11-18 21:13:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 1.6588511137162953) internal successors, (1415), 853 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1415 transitions. [2022-11-18 21:13:58,830 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1415 transitions. Word has length 560 [2022-11-18 21:13:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:58,830 INFO L495 AbstractCegarLoop]: Abstraction has 854 states and 1415 transitions. [2022-11-18 21:13:58,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.9375) internal successors, (463), 16 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1415 transitions. [2022-11-18 21:13:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2022-11-18 21:13:58,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:58,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:58,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 21:13:59,051 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:13:59,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash 979883567, now seen corresponding path program 1 times [2022-11-18 21:13:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:13:59,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622660482] [2022-11-18 21:13:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:59,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:13:59,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:13:59,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712404989] [2022-11-18 21:13:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:59,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:59,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:13:59,285 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:13:59,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 21:14:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:14:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 4597 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-18 21:14:03,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:14:04,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:14:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 21:14:06,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:14:06,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622660482] [2022-11-18 21:14:06,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:14:06,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712404989] [2022-11-18 21:14:06,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712404989] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:14:06,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:14:06,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [18] total 30 [2022-11-18 21:14:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225922467] [2022-11-18 21:14:06,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:14:06,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:14:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:14:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:14:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:14:06,536 INFO L87 Difference]: Start difference. First operand 854 states and 1415 transitions. Second operand has 15 states, 15 states have (on average 30.866666666666667) internal successors, (463), 15 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:08,612 INFO L93 Difference]: Finished difference Result 3024 states and 5016 transitions. [2022-11-18 21:14:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 21:14:08,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 30.866666666666667) internal successors, (463), 15 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 560 [2022-11-18 21:14:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:08,616 INFO L225 Difference]: With dead ends: 3024 [2022-11-18 21:14:08,616 INFO L226 Difference]: Without dead ends: 2322 [2022-11-18 21:14:08,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1185 GetRequests, 1123 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=635, Invalid=3397, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 21:14:08,618 INFO L413 NwaCegarLoop]: 1327 mSDtfsCounter, 14965 mSDsluCounter, 17080 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14965 SdHoareTripleChecker+Valid, 18407 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:08,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14965 Valid, 18407 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:14:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-11-18 21:14:08,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 818. [2022-11-18 21:14:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.6597307221542228) internal successors, (1356), 817 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1356 transitions. [2022-11-18 21:14:08,633 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1356 transitions. Word has length 560 [2022-11-18 21:14:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:08,633 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1356 transitions. [2022-11-18 21:14:08,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.866666666666667) internal successors, (463), 15 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1356 transitions. [2022-11-18 21:14:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-11-18 21:14:08,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:08,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:08,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 21:14:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 21:14:08,855 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:14:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2051091307, now seen corresponding path program 1 times [2022-11-18 21:14:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:14:08,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598279992] [2022-11-18 21:14:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:14:09,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:14:09,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672743063] [2022-11-18 21:14:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:09,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:14:09,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:14:09,069 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:14:09,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 21:14:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:14:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 4600 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 21:14:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:14:18,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:14:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:14:23,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:14:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598279992] [2022-11-18 21:14:23,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:14:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672743063] [2022-11-18 21:14:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672743063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:14:23,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:14:23,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-11-18 21:14:23,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580919511] [2022-11-18 21:14:23,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:14:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 21:14:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:14:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 21:14:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:14:23,567 INFO L87 Difference]: Start difference. First operand 818 states and 1356 transitions. Second operand has 21 states, 21 states have (on average 53.333333333333336) internal successors, (1120), 21 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:43,942 INFO L93 Difference]: Finished difference Result 11704 states and 19423 transitions. [2022-11-18 21:14:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 21:14:43,943 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 53.333333333333336) internal successors, (1120), 21 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 561 [2022-11-18 21:14:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:43,952 INFO L225 Difference]: With dead ends: 11704 [2022-11-18 21:14:43,952 INFO L226 Difference]: Without dead ends: 11035 [2022-11-18 21:14:43,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=920, Invalid=2502, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 21:14:43,956 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 96576 mSDsluCounter, 4206 mSDsCounter, 0 mSdLazyCounter, 12872 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96576 SdHoareTripleChecker+Valid, 4587 SdHoareTripleChecker+Invalid, 12929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 12872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:43,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96576 Valid, 4587 Invalid, 12929 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [57 Valid, 12872 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2022-11-18 21:14:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11035 states. [2022-11-18 21:14:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11035 to 1592. [2022-11-18 21:14:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.6599622878692646) internal successors, (2641), 1591 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 2641 transitions. [2022-11-18 21:14:44,027 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 2641 transitions. Word has length 561 [2022-11-18 21:14:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:44,027 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 2641 transitions. [2022-11-18 21:14:44,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.333333333333336) internal successors, (1120), 21 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 2641 transitions. [2022-11-18 21:14:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2022-11-18 21:14:44,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:44,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:44,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-18 21:14:44,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 21:14:44,263 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:14:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1991253245, now seen corresponding path program 1 times [2022-11-18 21:14:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:14:44,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71114125] [2022-11-18 21:14:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:44,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:14:44,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:14:44,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551359724] [2022-11-18 21:14:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:44,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:14:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:14:44,487 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:14:44,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 21:14:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:14:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 4603 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-18 21:14:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:14:54,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:14:54,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:14:54,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71114125] [2022-11-18 21:14:54,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:14:54,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551359724] [2022-11-18 21:14:54,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551359724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:14:54,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:14:54,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 21:14:54,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015992825] [2022-11-18 21:14:54,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:14:54,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:14:54,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:14:54,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:14:54,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:14:54,095 INFO L87 Difference]: Start difference. First operand 1592 states and 2641 transitions. Second operand has 11 states, 11 states have (on average 51.09090909090909) internal successors, (562), 11 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:15:00,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:15:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:15:02,469 INFO L93 Difference]: Finished difference Result 5040 states and 8358 transitions. [2022-11-18 21:15:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 21:15:02,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 51.09090909090909) internal successors, (562), 11 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 562 [2022-11-18 21:15:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:15:02,474 INFO L225 Difference]: With dead ends: 5040 [2022-11-18 21:15:02,474 INFO L226 Difference]: Without dead ends: 3450 [2022-11-18 21:15:02,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:15:02,476 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 3744 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 5925 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3744 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 5938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5925 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:15:02,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3744 Valid, 2763 Invalid, 5938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5925 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-18 21:15:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2022-11-18 21:15:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 1969. [2022-11-18 21:15:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 1.6585365853658536) internal successors, (3264), 1968 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:15:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3264 transitions. [2022-11-18 21:15:02,517 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3264 transitions. Word has length 562 [2022-11-18 21:15:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:15:02,518 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 3264 transitions. [2022-11-18 21:15:02,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 51.09090909090909) internal successors, (562), 11 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:15:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3264 transitions. [2022-11-18 21:15:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2022-11-18 21:15:02,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:15:02,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:15:02,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 21:15:02,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 21:15:02,751 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:15:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:15:02,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1769477311, now seen corresponding path program 1 times [2022-11-18 21:15:02,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:15:02,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654629943] [2022-11-18 21:15:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:15:02,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:15:02,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:15:02,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601039739] [2022-11-18 21:15:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:15:02,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:15:02,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:15:02,975 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:15:03,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 21:15:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:15:06,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 4603 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-18 21:15:06,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:15:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:15:13,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:15:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:15:22,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:15:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654629943] [2022-11-18 21:15:22,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:15:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601039739] [2022-11-18 21:15:22,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601039739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:15:22,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:15:22,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2022-11-18 21:15:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446550627] [2022-11-18 21:15:22,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:15:22,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 21:15:22,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:15:22,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 21:15:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-11-18 21:15:22,191 INFO L87 Difference]: Start difference. First operand 1969 states and 3264 transitions. Second operand has 28 states, 28 states have (on average 40.07142857142857) internal successors, (1122), 28 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:15:39,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:15:41,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:15:43,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:15:48,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:15:49,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:15:53,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:15:55,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:16:51,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:16:52,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:16:56,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:17:12,935 INFO L93 Difference]: Finished difference Result 106463 states and 176868 transitions. [2022-11-18 21:17:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-18 21:17:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 40.07142857142857) internal successors, (1122), 28 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 562 [2022-11-18 21:17:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:17:13,105 INFO L225 Difference]: With dead ends: 106463 [2022-11-18 21:17:13,105 INFO L226 Difference]: Without dead ends: 104873 [2022-11-18 21:17:13,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1309 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19133 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=9520, Invalid=36490, Unknown=0, NotChecked=0, Total=46010 [2022-11-18 21:17:13,143 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 196373 mSDsluCounter, 12934 mSDsCounter, 0 mSdLazyCounter, 27585 mSolverCounterSat, 190 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196373 SdHoareTripleChecker+Valid, 13345 SdHoareTripleChecker+Invalid, 27779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 27585 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:17:13,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196373 Valid, 13345 Invalid, 27779 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [190 Valid, 27585 Invalid, 4 Unknown, 0 Unchecked, 78.1s Time] [2022-11-18 21:17:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104873 states. [2022-11-18 21:17:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104873 to 2573. [2022-11-18 21:17:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 1.6574650077760498) internal successors, (4263), 2572 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:17:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4263 transitions. [2022-11-18 21:17:14,044 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4263 transitions. Word has length 562 [2022-11-18 21:17:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:17:14,044 INFO L495 AbstractCegarLoop]: Abstraction has 2573 states and 4263 transitions. [2022-11-18 21:17:14,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 40.07142857142857) internal successors, (1122), 28 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:17:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4263 transitions. [2022-11-18 21:17:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-11-18 21:17:14,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:17:14,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:17:14,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 21:17:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 21:17:14,279 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:17:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:17:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2020748921, now seen corresponding path program 1 times [2022-11-18 21:17:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:17:14,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48462200] [2022-11-18 21:17:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:17:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:17:14,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:17:14,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647241947] [2022-11-18 21:17:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:17:14,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:17:14,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:17:14,513 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:17:14,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 21:17:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:17:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 4606 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 21:17:19,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:17:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:17:23,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:17:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 50 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:17:29,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:17:29,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48462200] [2022-11-18 21:17:29,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:17:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647241947] [2022-11-18 21:17:29,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647241947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:17:29,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:17:29,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-18 21:17:29,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377940752] [2022-11-18 21:17:29,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:17:29,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 21:17:29,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:17:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 21:17:29,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:17:29,727 INFO L87 Difference]: Start difference. First operand 2573 states and 4263 transitions. Second operand has 24 states, 24 states have (on average 46.833333333333336) internal successors, (1124), 24 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:17:48,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:50,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:18:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:18:45,457 INFO L93 Difference]: Finished difference Result 110887 states and 183986 transitions. [2022-11-18 21:18:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-11-18 21:18:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 46.833333333333336) internal successors, (1124), 24 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 563 [2022-11-18 21:18:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:18:45,565 INFO L225 Difference]: With dead ends: 110887 [2022-11-18 21:18:45,566 INFO L226 Difference]: Without dead ends: 108693 [2022-11-18 21:18:45,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1175 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17349 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=7824, Invalid=33588, Unknown=0, NotChecked=0, Total=41412 [2022-11-18 21:18:45,584 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 191442 mSDsluCounter, 9737 mSDsCounter, 0 mSdLazyCounter, 24032 mSolverCounterSat, 150 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191442 SdHoareTripleChecker+Valid, 10193 SdHoareTripleChecker+Invalid, 24183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 24032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:18:45,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191442 Valid, 10193 Invalid, 24183 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [150 Valid, 24032 Invalid, 1 Unknown, 0 Unchecked, 55.1s Time] [2022-11-18 21:18:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108693 states. [2022-11-18 21:18:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108693 to 3334. [2022-11-18 21:18:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 1.6558655865586558) internal successors, (5519), 3333 states have internal predecessors, (5519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:18:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 5519 transitions. [2022-11-18 21:18:46,244 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 5519 transitions. Word has length 563 [2022-11-18 21:18:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:18:46,244 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 5519 transitions. [2022-11-18 21:18:46,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 46.833333333333336) internal successors, (1124), 24 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:18:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 5519 transitions. [2022-11-18 21:18:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-11-18 21:18:46,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:18:46,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:18:46,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 21:18:46,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:18:46,471 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:18:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:18:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1667730229, now seen corresponding path program 1 times [2022-11-18 21:18:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:18:46,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366309178] [2022-11-18 21:18:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:18:46,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:18:46,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:18:46,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84554765] [2022-11-18 21:18:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:18:46,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:18:46,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:18:46,743 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:18:46,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 21:18:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:18:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 4609 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-18 21:18:51,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:18:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:18:56,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:19:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 44 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:19:03,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:19:03,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366309178] [2022-11-18 21:19:03,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:19:03,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84554765] [2022-11-18 21:19:03,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84554765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:19:03,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:19:03,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2022-11-18 21:19:03,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354047348] [2022-11-18 21:19:03,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:19:03,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 21:19:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:19:03,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 21:19:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:19:03,082 INFO L87 Difference]: Start difference. First operand 3334 states and 5519 transitions. Second operand has 30 states, 30 states have (on average 37.53333333333333) internal successors, (1126), 30 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:19:29,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:19:31,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:19:33,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:19:36,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:19:38,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:19:41,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:19:44,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:20:40,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:21:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:21:22,150 INFO L93 Difference]: Finished difference Result 125803 states and 208559 transitions. [2022-11-18 21:21:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2022-11-18 21:21:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 37.53333333333333) internal successors, (1126), 30 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 564 [2022-11-18 21:21:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:21:22,262 INFO L225 Difference]: With dead ends: 125803 [2022-11-18 21:21:22,262 INFO L226 Difference]: Without dead ends: 123150 [2022-11-18 21:21:22,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1523 GetRequests, 1177 SyntacticMatches, 0 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53204 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=17908, Invalid=102848, Unknown=0, NotChecked=0, Total=120756 [2022-11-18 21:21:22,438 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 121694 mSDsluCounter, 20330 mSDsCounter, 0 mSdLazyCounter, 50982 mSolverCounterSat, 105 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121694 SdHoareTripleChecker+Valid, 21154 SdHoareTripleChecker+Invalid, 51094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 50982 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:21:22,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121694 Valid, 21154 Invalid, 51094 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [105 Valid, 50982 Invalid, 7 Unknown, 0 Unchecked, 101.7s Time] [2022-11-18 21:21:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123150 states. [2022-11-18 21:21:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123150 to 3361. [2022-11-18 21:21:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 1.6559523809523808) internal successors, (5564), 3360 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:21:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 5564 transitions. [2022-11-18 21:21:22,956 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 5564 transitions. Word has length 564 [2022-11-18 21:21:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:21:22,957 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 5564 transitions. [2022-11-18 21:21:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 37.53333333333333) internal successors, (1126), 30 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:21:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 5564 transitions. [2022-11-18 21:21:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-11-18 21:21:22,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:21:22,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:21:23,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 21:21:23,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-18 21:21:23,169 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:21:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:21:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash -826463817, now seen corresponding path program 1 times [2022-11-18 21:21:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:21:23,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768000478] [2022-11-18 21:21:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:21:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:21:23,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:21:23,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088622028] [2022-11-18 21:21:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:21:23,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:21:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:21:23,387 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:21:23,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be705529-5223-4003-ae83-97f52bfa1371/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 21:21:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:21:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 4612 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-18 21:21:28,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:21:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:21:33,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:21:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 38 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:21:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:21:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768000478] [2022-11-18 21:21:40,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:21:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088622028] [2022-11-18 21:21:40,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088622028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:21:40,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:21:40,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2022-11-18 21:21:40,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36878501] [2022-11-18 21:21:40,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:21:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 21:21:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:21:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 21:21:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 21:21:40,040 INFO L87 Difference]: Start difference. First operand 3361 states and 5564 transitions. Second operand has 34 states, 34 states have (on average 33.1764705882353) internal successors, (1128), 34 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)