./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:35:44,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:35:44,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:35:44,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:35:44,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:35:44,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:35:44,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:35:44,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:35:44,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:35:44,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:35:44,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:35:44,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:35:44,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:35:44,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:35:44,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:35:44,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:35:44,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:35:44,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:35:44,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:35:44,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:35:44,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:35:44,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:35:44,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:35:44,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:35:44,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:35:44,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:35:44,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:35:44,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:35:44,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:35:44,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:35:44,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:35:44,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:35:44,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:35:44,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:35:44,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:35:44,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:35:44,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:35:44,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:35:44,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:35:44,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:35:44,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:35:44,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:35:44,549 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:35:44,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:35:44,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:35:44,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:35:44,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:35:44,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:35:44,553 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:35:44,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:35:44,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:35:44,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:35:44,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:35:44,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:35:44,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:35:44,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:35:44,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:35:44,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:35:44,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:35:44,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:35:44,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:35:44,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:35:44,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:35:44,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:35:44,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:35:44,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:35:44,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:35:44,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:35:44,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:35:44,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:35:44,561 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:35:44,561 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:35:44,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:35:44,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:35:44,562 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_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2021-11-09 08:35:44,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:35:44,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:35:44,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:35:44,867 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:35:44,867 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:35:44,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2021-11-09 08:35:44,959 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/data/fc3a8e762/c51b35c60740414c9ab48a6f61d3ef7b/FLAG931d62c91 [2021-11-09 08:35:45,585 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:35:45,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2021-11-09 08:35:45,601 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/data/fc3a8e762/c51b35c60740414c9ab48a6f61d3ef7b/FLAG931d62c91 [2021-11-09 08:35:45,940 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/data/fc3a8e762/c51b35c60740414c9ab48a6f61d3ef7b [2021-11-09 08:35:45,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:35:45,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:35:45,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:45,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:35:45,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:35:45,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:45" (1/1) ... [2021-11-09 08:35:45,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795670d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:45, skipping insertion in model container [2021-11-09 08:35:45,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:45" (1/1) ... [2021-11-09 08:35:45,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:35:46,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:35:46,225 WARN L228 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_d65f3191-9bec-40e8-896a-f55b5c976547/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2021-11-09 08:35:46,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:46,258 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:35:46,273 WARN L228 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_d65f3191-9bec-40e8-896a-f55b5c976547/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2021-11-09 08:35:46,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:46,301 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:35:46,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46 WrapperNode [2021-11-09 08:35:46,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:46,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:35:46,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:35:46,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:35:46,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:35:46,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:35:46,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:35:46,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:35:46,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:35:46,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:35:46,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:35:46,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:35:46,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (1/1) ... [2021-11-09 08:35:46,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:35:46,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:46,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:35:46,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:35:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:35:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:35:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:35:46,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:35:46,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:35:46,829 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-09 08:35:46,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:35:46 BoogieIcfgContainer [2021-11-09 08:35:46,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:35:46,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:35:46,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:35:46,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:35:46,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:35:45" (1/3) ... [2021-11-09 08:35:46,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c97052e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:35:46, skipping insertion in model container [2021-11-09 08:35:46,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:46" (2/3) ... [2021-11-09 08:35:46,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c97052e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:35:46, skipping insertion in model container [2021-11-09 08:35:46,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:35:46" (3/3) ... [2021-11-09 08:35:46,840 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2021-11-09 08:35:46,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:35:46,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-09 08:35:46,908 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:35:46,916 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:35:46,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-09 08:35:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:35:46,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:46,958 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:46,959 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1233339761, now seen corresponding path program 1 times [2021-11-09 08:35:46,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:46,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51777075] [2021-11-09 08:35:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:46,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:47,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:47,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51777075] [2021-11-09 08:35:47,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51777075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:47,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:47,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:35:47,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585695735] [2021-11-09 08:35:47,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:35:47,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:35:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:35:47,224 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:47,243 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-11-09 08:35:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:35:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 08:35:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:47,251 INFO L225 Difference]: With dead ends: 77 [2021-11-09 08:35:47,251 INFO L226 Difference]: Without dead ends: 36 [2021-11-09 08:35:47,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:35:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-09 08:35:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-09 08:35:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-09 08:35:47,290 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-11-09 08:35:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:47,291 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-09 08:35:47,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-09 08:35:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:35:47,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:47,292 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:47,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:35:47,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1507359540, now seen corresponding path program 1 times [2021-11-09 08:35:47,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:47,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142389701] [2021-11-09 08:35:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:47,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:47,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:47,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161742823] [2021-11-09 08:35:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:47,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:47,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:47,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:35:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:47,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:35:47,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:47,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:47,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142389701] [2021-11-09 08:35:47,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:47,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161742823] [2021-11-09 08:35:47,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161742823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:47,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:47,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:35:47,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733030462] [2021-11-09 08:35:47,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:35:47,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:35:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:35:47,608 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:47,638 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-09 08:35:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:35:47,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 08:35:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:47,641 INFO L225 Difference]: With dead ends: 42 [2021-11-09 08:35:47,641 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 08:35:47,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:35:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 08:35:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-09 08:35:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-09 08:35:47,651 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2021-11-09 08:35:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:47,651 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-09 08:35:47,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-09 08:35:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:35:47,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:47,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:47,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:47,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:47,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash 515746917, now seen corresponding path program 1 times [2021-11-09 08:35:47,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:47,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453831612] [2021-11-09 08:35:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:47,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:47,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:47,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113942301] [2021-11-09 08:35:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:47,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:47,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:47,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:47,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:35:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:35:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:48,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:48,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453831612] [2021-11-09 08:35:48,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:48,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113942301] [2021-11-09 08:35:48,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113942301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:48,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:48,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:35:48,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190083093] [2021-11-09 08:35:48,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:35:48,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:35:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:35:48,096 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:48,198 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-11-09 08:35:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:35:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-09 08:35:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:48,201 INFO L225 Difference]: With dead ends: 66 [2021-11-09 08:35:48,201 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:35:48,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:35:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2021-11-09 08:35:48,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-09 08:35:48,211 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2021-11-09 08:35:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:48,212 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-09 08:35:48,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-09 08:35:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 08:35:48,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:48,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:48,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:48,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:48,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:48,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2021-11-09 08:35:48,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:48,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591296740] [2021-11-09 08:35:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:48,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:48,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:48,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348136551] [2021-11-09 08:35:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:48,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:48,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:48,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:48,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:35:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:35:48,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:48,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:48,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591296740] [2021-11-09 08:35:48,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:48,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348136551] [2021-11-09 08:35:48,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348136551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:48,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:48,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:35:48,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566153388] [2021-11-09 08:35:48,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:48,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:48,978 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:49,164 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-11-09 08:35:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:35:49,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 08:35:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:49,170 INFO L225 Difference]: With dead ends: 62 [2021-11-09 08:35:49,170 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 08:35:49,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 08:35:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-09 08:35:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-11-09 08:35:49,197 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2021-11-09 08:35:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:49,198 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-11-09 08:35:49,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-11-09 08:35:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:35:49,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:49,199 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:49,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:49,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:49,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash -648504839, now seen corresponding path program 1 times [2021-11-09 08:35:49,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:49,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977696668] [2021-11-09 08:35:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:49,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:49,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:49,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785864271] [2021-11-09 08:35:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:49,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:49,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:49,474 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:49,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:35:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:35:49,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:49,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:49,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977696668] [2021-11-09 08:35:49,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:49,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785864271] [2021-11-09 08:35:49,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785864271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:49,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:49,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:35:49,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514494610] [2021-11-09 08:35:49,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:35:49,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:35:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:35:49,653 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:49,695 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-11-09 08:35:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:35:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 08:35:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:49,703 INFO L225 Difference]: With dead ends: 85 [2021-11-09 08:35:49,703 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 08:35:49,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:35:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 08:35:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-09 08:35:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.34) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-09 08:35:49,712 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2021-11-09 08:35:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:49,713 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-09 08:35:49,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-09 08:35:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:35:49,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:49,725 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:49,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 08:35:49,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:49,942 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:49,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1354097033, now seen corresponding path program 1 times [2021-11-09 08:35:49,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:49,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811521757] [2021-11-09 08:35:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:49,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:49,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:49,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782971508] [2021-11-09 08:35:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:49,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:49,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:49,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:35:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:50,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:35:50,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:50,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:50,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811521757] [2021-11-09 08:35:50,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:50,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782971508] [2021-11-09 08:35:50,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782971508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:50,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:50,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 08:35:50,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305110290] [2021-11-09 08:35:50,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:50,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:50,156 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:50,194 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-11-09 08:35:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:35:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:35:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:50,203 INFO L225 Difference]: With dead ends: 64 [2021-11-09 08:35:50,203 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 08:35:50,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 08:35:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-09 08:35:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-09 08:35:50,227 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2021-11-09 08:35:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:50,228 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-09 08:35:50,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-09 08:35:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:35:50,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:50,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:50,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:50,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:35:50,454 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1292001664, now seen corresponding path program 1 times [2021-11-09 08:35:50,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:50,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081939507] [2021-11-09 08:35:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:50,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:50,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:50,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469258445] [2021-11-09 08:35:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:50,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:50,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:50,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:50,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:35:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:35:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:50,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:50,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081939507] [2021-11-09 08:35:50,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:50,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469258445] [2021-11-09 08:35:50,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469258445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:50,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:50,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:35:50,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152984937] [2021-11-09 08:35:50,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:35:50,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:35:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:50,899 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:51,272 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-11-09 08:35:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:35:51,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:35:51,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:51,273 INFO L225 Difference]: With dead ends: 82 [2021-11-09 08:35:51,273 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 08:35:51,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:35:51,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 08:35:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2021-11-09 08:35:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-11-09 08:35:51,286 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2021-11-09 08:35:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:51,287 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-11-09 08:35:51,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-11-09 08:35:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:35:51,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:51,289 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:51,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:51,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:51,506 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:51,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash 971917338, now seen corresponding path program 1 times [2021-11-09 08:35:51,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:51,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105924873] [2021-11-09 08:35:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:51,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:51,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:51,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010602454] [2021-11-09 08:35:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:51,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:51,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:51,521 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:51,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:35:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:51,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:35:51,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:51,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:51,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105924873] [2021-11-09 08:35:51,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:51,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010602454] [2021-11-09 08:35:51,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010602454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:51,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:51,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:35:51,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866299526] [2021-11-09 08:35:51,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:35:51,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:35:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:51,736 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:51,968 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2021-11-09 08:35:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:35:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 08:35:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:51,975 INFO L225 Difference]: With dead ends: 191 [2021-11-09 08:35:51,976 INFO L226 Difference]: Without dead ends: 187 [2021-11-09 08:35:51,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:35:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-09 08:35:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2021-11-09 08:35:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 90 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2021-11-09 08:35:52,015 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2021-11-09 08:35:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:52,015 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2021-11-09 08:35:52,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2021-11-09 08:35:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:35:52,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:52,018 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:52,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:52,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:52,246 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash -367893245, now seen corresponding path program 1 times [2021-11-09 08:35:52,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:52,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689755576] [2021-11-09 08:35:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:52,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:52,261 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:52,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560631964] [2021-11-09 08:35:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:52,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:52,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:52,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:52,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:35:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:35:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:52,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:52,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689755576] [2021-11-09 08:35:52,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:52,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560631964] [2021-11-09 08:35:52,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560631964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:52,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:52,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:35:52,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404512783] [2021-11-09 08:35:52,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:35:52,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:52,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:35:52,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:52,578 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:52,747 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2021-11-09 08:35:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:35:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 08:35:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:52,749 INFO L225 Difference]: With dead ends: 111 [2021-11-09 08:35:52,749 INFO L226 Difference]: Without dead ends: 109 [2021-11-09 08:35:52,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:35:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-09 08:35:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2021-11-09 08:35:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.375) internal successors, (132), 100 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2021-11-09 08:35:52,764 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2021-11-09 08:35:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:52,764 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2021-11-09 08:35:52,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2021-11-09 08:35:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:35:52,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:52,765 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:52,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:52,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:52,988 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:52,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1357932506, now seen corresponding path program 1 times [2021-11-09 08:35:52,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:52,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093232527] [2021-11-09 08:35:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:52,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:53,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:53,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345526553] [2021-11-09 08:35:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:53,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:53,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:53,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:53,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:35:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:35:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:53,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:53,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093232527] [2021-11-09 08:35:53,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:53,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345526553] [2021-11-09 08:35:53,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345526553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:53,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:53,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:35:53,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057796007] [2021-11-09 08:35:53,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:35:53,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:35:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:35:53,287 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:53,367 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2021-11-09 08:35:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:35:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 08:35:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:53,371 INFO L225 Difference]: With dead ends: 226 [2021-11-09 08:35:53,371 INFO L226 Difference]: Without dead ends: 224 [2021-11-09 08:35:53,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:35:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-09 08:35:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2021-11-09 08:35:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.356060606060606) internal successors, (179), 136 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2021-11-09 08:35:53,397 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 22 [2021-11-09 08:35:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:53,398 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2021-11-09 08:35:53,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2021-11-09 08:35:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:35:53,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:53,401 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:53,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:53,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:35:53,627 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1235592658, now seen corresponding path program 1 times [2021-11-09 08:35:53,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:53,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059659911] [2021-11-09 08:35:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:53,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:53,641 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:53,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493481028] [2021-11-09 08:35:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:53,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:53,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:53,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:35:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:35:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:54,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:54,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059659911] [2021-11-09 08:35:54,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:54,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493481028] [2021-11-09 08:35:54,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493481028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:54,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:54,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:35:54,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775629278] [2021-11-09 08:35:54,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:35:54,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:35:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:54,070 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:54,207 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2021-11-09 08:35:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:35:54,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 08:35:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:54,209 INFO L225 Difference]: With dead ends: 210 [2021-11-09 08:35:54,209 INFO L226 Difference]: Without dead ends: 208 [2021-11-09 08:35:54,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:35:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-09 08:35:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2021-11-09 08:35:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.381720430107527) internal successors, (257), 190 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-11-09 08:35:54,229 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 23 [2021-11-09 08:35:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:54,229 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-11-09 08:35:54,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-11-09 08:35:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:35:54,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:54,230 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:54,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:54,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:35:54,453 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:54,454 INFO L85 PathProgramCache]: Analyzing trace with hash -138249927, now seen corresponding path program 1 times [2021-11-09 08:35:54,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:54,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903844841] [2021-11-09 08:35:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:54,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:54,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:54,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876996290] [2021-11-09 08:35:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:54,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:54,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:54,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:35:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:35:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:54,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:54,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903844841] [2021-11-09 08:35:54,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:54,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876996290] [2021-11-09 08:35:54,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876996290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:54,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:54,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:35:54,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891315239] [2021-11-09 08:35:54,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:54,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:54,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:54,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:54,718 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:54,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:54,760 INFO L93 Difference]: Finished difference Result 280 states and 375 transitions. [2021-11-09 08:35:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:35:54,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 08:35:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:54,763 INFO L225 Difference]: With dead ends: 280 [2021-11-09 08:35:54,763 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 08:35:54,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 08:35:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-09 08:35:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3763440860215055) internal successors, (256), 190 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2021-11-09 08:35:54,784 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 23 [2021-11-09 08:35:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:54,785 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2021-11-09 08:35:54,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2021-11-09 08:35:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:35:54,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:54,786 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:54,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:55,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 08:35:55,002 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash -265418908, now seen corresponding path program 1 times [2021-11-09 08:35:55,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:55,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97327642] [2021-11-09 08:35:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:55,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:55,016 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:55,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538338883] [2021-11-09 08:35:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:55,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:55,018 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:55,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:35:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:55,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:35:55,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:55,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:55,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97327642] [2021-11-09 08:35:55,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:55,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538338883] [2021-11-09 08:35:55,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538338883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:55,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:55,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:35:55,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316062249] [2021-11-09 08:35:55,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:35:55,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:35:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:55,327 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:55,392 INFO L93 Difference]: Finished difference Result 303 states and 411 transitions. [2021-11-09 08:35:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:35:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:35:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:55,395 INFO L225 Difference]: With dead ends: 303 [2021-11-09 08:35:55,395 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 08:35:55,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 08:35:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-11-09 08:35:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.368421052631579) internal successors, (260), 194 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2021-11-09 08:35:55,419 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 24 [2021-11-09 08:35:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:55,420 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2021-11-09 08:35:55,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2021-11-09 08:35:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:35:55,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:55,421 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:55,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:55,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:55,642 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1931632236, now seen corresponding path program 2 times [2021-11-09 08:35:55,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:55,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954264230] [2021-11-09 08:35:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:55,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:55,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:55,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286877587] [2021-11-09 08:35:55,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:55,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:55,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:55,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:35:55,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:55,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:35:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:55,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:55,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954264230] [2021-11-09 08:35:55,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:55,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286877587] [2021-11-09 08:35:55,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286877587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:55,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:55,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:35:55,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987626534] [2021-11-09 08:35:55,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:35:55,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:55,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:35:55,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:55,984 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:56,048 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2021-11-09 08:35:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:35:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 08:35:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:56,051 INFO L225 Difference]: With dead ends: 223 [2021-11-09 08:35:56,051 INFO L226 Difference]: Without dead ends: 219 [2021-11-09 08:35:56,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:35:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-09 08:35:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2021-11-09 08:35:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.3604060913705585) internal successors, (268), 201 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2021-11-09 08:35:56,073 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 25 [2021-11-09 08:35:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:56,074 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2021-11-09 08:35:56,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2021-11-09 08:35:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:35:56,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:56,075 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:56,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:56,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:35:56,294 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1993727605, now seen corresponding path program 1 times [2021-11-09 08:35:56,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:56,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428755081] [2021-11-09 08:35:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:56,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:56,307 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:56,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642992378] [2021-11-09 08:35:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:56,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:56,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:56,309 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:56,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:35:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:35:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:56,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:56,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428755081] [2021-11-09 08:35:56,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:56,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642992378] [2021-11-09 08:35:56,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642992378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:56,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:56,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:35:56,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771692662] [2021-11-09 08:35:56,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:56,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:56,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:56,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:56,898 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:57,089 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2021-11-09 08:35:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:35:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 08:35:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:57,092 INFO L225 Difference]: With dead ends: 216 [2021-11-09 08:35:57,092 INFO L226 Difference]: Without dead ends: 214 [2021-11-09 08:35:57,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:35:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-09 08:35:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2021-11-09 08:35:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.350253807106599) internal successors, (266), 201 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2021-11-09 08:35:57,116 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2021-11-09 08:35:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:57,117 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2021-11-09 08:35:57,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2021-11-09 08:35:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:35:57,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:57,118 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:57,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:57,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:57,342 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash 416971704, now seen corresponding path program 1 times [2021-11-09 08:35:57,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:57,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241527044] [2021-11-09 08:35:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:57,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:57,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:57,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190944164] [2021-11-09 08:35:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:57,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:57,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:57,357 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:57,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:35:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:35:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:57,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:57,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241527044] [2021-11-09 08:35:57,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:57,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190944164] [2021-11-09 08:35:57,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190944164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:57,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:57,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:35:57,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200478636] [2021-11-09 08:35:57,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:35:57,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:57,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:35:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:57,799 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:58,114 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2021-11-09 08:35:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:35:58,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-09 08:35:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:58,119 INFO L225 Difference]: With dead ends: 336 [2021-11-09 08:35:58,120 INFO L226 Difference]: Without dead ends: 334 [2021-11-09 08:35:58,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:35:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-09 08:35:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2021-11-09 08:35:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 242 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2021-11-09 08:35:58,147 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 27 [2021-11-09 08:35:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:58,148 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2021-11-09 08:35:58,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2021-11-09 08:35:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:35:58,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:58,151 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:58,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:58,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:35:58,374 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1345328893, now seen corresponding path program 2 times [2021-11-09 08:35:58,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:58,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719824259] [2021-11-09 08:35:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:58,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:58,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:58,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319618248] [2021-11-09 08:35:58,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:58,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:58,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:58,389 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:58,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:35:58,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:58,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:35:58,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:58,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:58,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719824259] [2021-11-09 08:35:58,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:58,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319618248] [2021-11-09 08:35:58,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319618248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:58,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:58,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:35:58,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306273291] [2021-11-09 08:35:58,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:35:58,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:35:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:35:58,703 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:58,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:58,807 INFO L93 Difference]: Finished difference Result 530 states and 713 transitions. [2021-11-09 08:35:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:35:58,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 08:35:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:58,811 INFO L225 Difference]: With dead ends: 530 [2021-11-09 08:35:58,811 INFO L226 Difference]: Without dead ends: 425 [2021-11-09 08:35:58,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-09 08:35:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 267. [2021-11-09 08:35:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.3549618320610688) internal successors, (355), 266 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 355 transitions. [2021-11-09 08:35:58,843 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 355 transitions. Word has length 30 [2021-11-09 08:35:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:58,843 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 355 transitions. [2021-11-09 08:35:58,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 355 transitions. [2021-11-09 08:35:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:35:58,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:58,845 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:58,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:59,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:35:59,070 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:59,070 INFO L85 PathProgramCache]: Analyzing trace with hash -28513692, now seen corresponding path program 1 times [2021-11-09 08:35:59,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:59,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729944781] [2021-11-09 08:35:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:59,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:59,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:59,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428752597] [2021-11-09 08:35:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:59,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:59,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:59,095 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:59,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:35:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:59,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:35:59,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:59,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:59,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729944781] [2021-11-09 08:35:59,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:59,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428752597] [2021-11-09 08:35:59,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428752597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:59,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:59,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:35:59,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27470482] [2021-11-09 08:35:59,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:35:59,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:35:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:59,445 INFO L87 Difference]: Start difference. First operand 267 states and 355 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:59,511 INFO L93 Difference]: Finished difference Result 487 states and 657 transitions. [2021-11-09 08:35:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:35:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 08:35:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:59,514 INFO L225 Difference]: With dead ends: 487 [2021-11-09 08:35:59,514 INFO L226 Difference]: Without dead ends: 285 [2021-11-09 08:35:59,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:35:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-09 08:35:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2021-11-09 08:35:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.3405797101449275) internal successors, (370), 280 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 370 transitions. [2021-11-09 08:35:59,542 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 370 transitions. Word has length 30 [2021-11-09 08:35:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:59,543 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 370 transitions. [2021-11-09 08:35:59,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 370 transitions. [2021-11-09 08:35:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:35:59,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:59,544 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:59,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-09 08:35:59,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:35:59,757 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:35:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:59,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1302269029, now seen corresponding path program 1 times [2021-11-09 08:35:59,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:59,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418651096] [2021-11-09 08:35:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:59,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:59,767 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:59,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227338754] [2021-11-09 08:35:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:59,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:59,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:59,769 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:59,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:35:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:59,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:35:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:00,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:00,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418651096] [2021-11-09 08:36:00,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:00,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227338754] [2021-11-09 08:36:00,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227338754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:00,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:00,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:36:00,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412746724] [2021-11-09 08:36:00,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:36:00,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:00,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:36:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:36:00,308 INFO L87 Difference]: Start difference. First operand 281 states and 370 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:00,600 INFO L93 Difference]: Finished difference Result 363 states and 478 transitions. [2021-11-09 08:36:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:36:00,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-11-09 08:36:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:00,603 INFO L225 Difference]: With dead ends: 363 [2021-11-09 08:36:00,604 INFO L226 Difference]: Without dead ends: 361 [2021-11-09 08:36:00,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:36:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-09 08:36:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 291. [2021-11-09 08:36:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.3356643356643356) internal successors, (382), 290 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 382 transitions. [2021-11-09 08:36:00,636 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 382 transitions. Word has length 32 [2021-11-09 08:36:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:00,637 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 382 transitions. [2021-11-09 08:36:00,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 382 transitions. [2021-11-09 08:36:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 08:36:00,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:00,638 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 08:36:00,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:00,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:00,861 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:00,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash 885134474, now seen corresponding path program 1 times [2021-11-09 08:36:00,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:00,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629625116] [2021-11-09 08:36:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:00,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:00,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:00,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612040963] [2021-11-09 08:36:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:00,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:00,878 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:00,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:36:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:01,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 08:36:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:02,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:02,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629625116] [2021-11-09 08:36:02,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:02,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612040963] [2021-11-09 08:36:02,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612040963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:02,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:02,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:36:02,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532769586] [2021-11-09 08:36:02,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:36:02,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:02,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:36:02,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:02,263 INFO L87 Difference]: Start difference. First operand 291 states and 382 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:02,863 INFO L93 Difference]: Finished difference Result 395 states and 508 transitions. [2021-11-09 08:36:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:36:02,864 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 08:36:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:02,867 INFO L225 Difference]: With dead ends: 395 [2021-11-09 08:36:02,867 INFO L226 Difference]: Without dead ends: 387 [2021-11-09 08:36:02,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:36:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-09 08:36:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 335. [2021-11-09 08:36:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.3242424242424242) internal successors, (437), 334 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 437 transitions. [2021-11-09 08:36:02,906 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 437 transitions. Word has length 33 [2021-11-09 08:36:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:02,907 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 437 transitions. [2021-11-09 08:36:02,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 437 transitions. [2021-11-09 08:36:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:36:02,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:02,908 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-09 08:36:02,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:03,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:03,122 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash 731699348, now seen corresponding path program 1 times [2021-11-09 08:36:03,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:03,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640296378] [2021-11-09 08:36:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:03,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:03,134 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:03,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498082765] [2021-11-09 08:36:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:03,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:03,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:03,136 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:03,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:36:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:36:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:03,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:03,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640296378] [2021-11-09 08:36:03,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:03,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498082765] [2021-11-09 08:36:03,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498082765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:03,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:03,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:36:03,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822087536] [2021-11-09 08:36:03,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:36:03,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:36:03,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:36:03,737 INFO L87 Difference]: Start difference. First operand 335 states and 437 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:03,832 INFO L93 Difference]: Finished difference Result 510 states and 677 transitions. [2021-11-09 08:36:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:36:03,833 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-09 08:36:03,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:03,836 INFO L225 Difference]: With dead ends: 510 [2021-11-09 08:36:03,836 INFO L226 Difference]: Without dead ends: 361 [2021-11-09 08:36:03,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:36:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-09 08:36:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 350. [2021-11-09 08:36:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.3159420289855073) internal successors, (454), 349 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) [2021-11-09 08:36:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 454 transitions. [2021-11-09 08:36:03,875 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 454 transitions. Word has length 38 [2021-11-09 08:36:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:03,876 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 454 transitions. [2021-11-09 08:36:03,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 454 transitions. [2021-11-09 08:36:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:36:03,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:03,877 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-09 08:36:03,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:04,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 08:36:04,099 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:04,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1517440196, now seen corresponding path program 1 times [2021-11-09 08:36:04,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:04,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358971214] [2021-11-09 08:36:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:04,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:04,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:04,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059616394] [2021-11-09 08:36:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:04,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:04,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:04,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:04,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:36:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:04,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:36:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:04,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:04,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358971214] [2021-11-09 08:36:04,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:04,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059616394] [2021-11-09 08:36:04,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059616394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:04,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:04,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:36:04,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234035253] [2021-11-09 08:36:04,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:36:04,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:36:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:36:04,803 INFO L87 Difference]: Start difference. First operand 350 states and 454 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:04,919 INFO L93 Difference]: Finished difference Result 421 states and 536 transitions. [2021-11-09 08:36:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:36:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 08:36:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:04,924 INFO L225 Difference]: With dead ends: 421 [2021-11-09 08:36:04,925 INFO L226 Difference]: Without dead ends: 417 [2021-11-09 08:36:04,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:36:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-09 08:36:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 358. [2021-11-09 08:36:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.3144475920679888) internal successors, (464), 357 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 464 transitions. [2021-11-09 08:36:04,969 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 464 transitions. Word has length 39 [2021-11-09 08:36:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:04,970 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 464 transitions. [2021-11-09 08:36:04,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 464 transitions. [2021-11-09 08:36:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:36:04,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:04,971 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 08:36:05,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:05,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:05,197 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:05,198 INFO L85 PathProgramCache]: Analyzing trace with hash -631528752, now seen corresponding path program 1 times [2021-11-09 08:36:05,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:05,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770631090] [2021-11-09 08:36:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:05,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:05,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:05,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497141544] [2021-11-09 08:36:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:05,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:05,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:05,217 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:05,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:36:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:05,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:36:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:05,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:05,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770631090] [2021-11-09 08:36:05,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:05,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497141544] [2021-11-09 08:36:05,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497141544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:05,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:05,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:36:05,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914181718] [2021-11-09 08:36:05,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:36:05,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:36:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:36:05,988 INFO L87 Difference]: Start difference. First operand 358 states and 464 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:06,781 INFO L93 Difference]: Finished difference Result 746 states and 961 transitions. [2021-11-09 08:36:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:36:06,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 08:36:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:06,788 INFO L225 Difference]: With dead ends: 746 [2021-11-09 08:36:06,788 INFO L226 Difference]: Without dead ends: 744 [2021-11-09 08:36:06,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=1079, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:36:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-11-09 08:36:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 397. [2021-11-09 08:36:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 392 states have (on average 1.316326530612245) internal successors, (516), 396 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 516 transitions. [2021-11-09 08:36:06,836 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 516 transitions. Word has length 39 [2021-11-09 08:36:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:06,836 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 516 transitions. [2021-11-09 08:36:06,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 516 transitions. [2021-11-09 08:36:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:36:06,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:06,838 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-09 08:36:06,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:07,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:07,066 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash 203246581, now seen corresponding path program 2 times [2021-11-09 08:36:07,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:07,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18532253] [2021-11-09 08:36:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:07,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:07,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:07,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959227857] [2021-11-09 08:36:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:07,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:07,084 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:07,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:36:07,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:07,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:36:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:07,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:07,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18532253] [2021-11-09 08:36:07,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:07,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959227857] [2021-11-09 08:36:07,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959227857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:07,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:07,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:36:07,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074515043] [2021-11-09 08:36:07,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:36:07,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:36:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:36:07,644 INFO L87 Difference]: Start difference. First operand 397 states and 516 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:08,071 INFO L93 Difference]: Finished difference Result 967 states and 1267 transitions. [2021-11-09 08:36:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:36:08,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-09 08:36:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:08,078 INFO L225 Difference]: With dead ends: 967 [2021-11-09 08:36:08,078 INFO L226 Difference]: Without dead ends: 963 [2021-11-09 08:36:08,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:36:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-09 08:36:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 471. [2021-11-09 08:36:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 466 states have (on average 1.3283261802575108) internal successors, (619), 470 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 619 transitions. [2021-11-09 08:36:08,158 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 619 transitions. Word has length 40 [2021-11-09 08:36:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:08,159 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 619 transitions. [2021-11-09 08:36:08,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 619 transitions. [2021-11-09 08:36:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:36:08,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:08,160 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-09 08:36:08,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:08,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:08,385 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash 905429967, now seen corresponding path program 1 times [2021-11-09 08:36:08,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:08,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302458880] [2021-11-09 08:36:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:08,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:08,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:08,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520888228] [2021-11-09 08:36:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:08,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:08,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:08,404 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:08,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:36:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:36:08,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:08,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:08,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302458880] [2021-11-09 08:36:08,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:08,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520888228] [2021-11-09 08:36:08,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520888228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:08,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:08,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:36:08,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763337191] [2021-11-09 08:36:08,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:36:08,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:36:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:36:08,990 INFO L87 Difference]: Start difference. First operand 471 states and 619 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:09,131 INFO L93 Difference]: Finished difference Result 785 states and 1052 transitions. [2021-11-09 08:36:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:36:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-09 08:36:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:09,136 INFO L225 Difference]: With dead ends: 785 [2021-11-09 08:36:09,136 INFO L226 Difference]: Without dead ends: 483 [2021-11-09 08:36:09,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:36:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-09 08:36:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 479. [2021-11-09 08:36:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 474 states have (on average 1.3206751054852321) internal successors, (626), 478 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 626 transitions. [2021-11-09 08:36:09,200 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 626 transitions. Word has length 40 [2021-11-09 08:36:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:09,200 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 626 transitions. [2021-11-09 08:36:09,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 626 transitions. [2021-11-09 08:36:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:36:09,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:09,202 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-09 08:36:09,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:09,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:36:09,421 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1573117064, now seen corresponding path program 1 times [2021-11-09 08:36:09,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:09,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306048416] [2021-11-09 08:36:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:09,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:09,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:09,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122344161] [2021-11-09 08:36:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:09,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:09,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:09,449 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:09,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:36:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:09,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:36:09,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:36:09,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:09,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306048416] [2021-11-09 08:36:09,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:09,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122344161] [2021-11-09 08:36:09,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122344161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:09,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:09,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:36:09,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427050211] [2021-11-09 08:36:09,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:36:09,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:36:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:09,965 INFO L87 Difference]: Start difference. First operand 479 states and 626 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:10,057 INFO L93 Difference]: Finished difference Result 906 states and 1214 transitions. [2021-11-09 08:36:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:36:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 08:36:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:10,061 INFO L225 Difference]: With dead ends: 906 [2021-11-09 08:36:10,062 INFO L226 Difference]: Without dead ends: 545 [2021-11-09 08:36:10,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-09 08:36:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 483. [2021-11-09 08:36:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.3284518828451883) internal successors, (635), 482 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 635 transitions. [2021-11-09 08:36:10,112 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 635 transitions. Word has length 41 [2021-11-09 08:36:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:10,112 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 635 transitions. [2021-11-09 08:36:10,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 635 transitions. [2021-11-09 08:36:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:36:10,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:10,113 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-09 08:36:10,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:10,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:36:10,329 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:10,329 INFO L85 PathProgramCache]: Analyzing trace with hash -149759960, now seen corresponding path program 2 times [2021-11-09 08:36:10,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:10,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952406268] [2021-11-09 08:36:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:10,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:10,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:10,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355033777] [2021-11-09 08:36:10,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:10,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:10,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:10,342 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:10,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:36:10,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 08:36:10,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:10,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:36:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:36:11,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:11,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952406268] [2021-11-09 08:36:11,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:11,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355033777] [2021-11-09 08:36:11,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355033777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:11,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:11,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:11,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239410786] [2021-11-09 08:36:11,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:11,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:11,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:11,064 INFO L87 Difference]: Start difference. First operand 483 states and 635 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:11,144 INFO L93 Difference]: Finished difference Result 560 states and 736 transitions. [2021-11-09 08:36:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:11,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 08:36:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:11,147 INFO L225 Difference]: With dead ends: 560 [2021-11-09 08:36:11,147 INFO L226 Difference]: Without dead ends: 558 [2021-11-09 08:36:11,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-09 08:36:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 539. [2021-11-09 08:36:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.3314606741573034) internal successors, (711), 538 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 711 transitions. [2021-11-09 08:36:11,201 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 711 transitions. Word has length 41 [2021-11-09 08:36:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:11,202 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 711 transitions. [2021-11-09 08:36:11,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 711 transitions. [2021-11-09 08:36:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:36:11,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:11,203 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:11,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:11,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:36:11,429 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash -595443504, now seen corresponding path program 2 times [2021-11-09 08:36:11,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:11,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672778048] [2021-11-09 08:36:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:11,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:11,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:11,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042910766] [2021-11-09 08:36:11,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:11,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:11,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:11,453 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:11,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:36:11,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:11,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:36:11,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:12,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:12,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672778048] [2021-11-09 08:36:12,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:12,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042910766] [2021-11-09 08:36:12,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042910766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:12,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:12,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:36:12,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919196449] [2021-11-09 08:36:12,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:36:12,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:36:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:36:12,329 INFO L87 Difference]: Start difference. First operand 539 states and 711 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:12,778 INFO L93 Difference]: Finished difference Result 668 states and 885 transitions. [2021-11-09 08:36:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:36:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-09 08:36:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:12,782 INFO L225 Difference]: With dead ends: 668 [2021-11-09 08:36:12,782 INFO L226 Difference]: Without dead ends: 666 [2021-11-09 08:36:12,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:36:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-11-09 08:36:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 549. [2021-11-09 08:36:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 544 states have (on average 1.3290441176470589) internal successors, (723), 548 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 723 transitions. [2021-11-09 08:36:12,848 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 723 transitions. Word has length 42 [2021-11-09 08:36:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:12,848 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 723 transitions. [2021-11-09 08:36:12,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 723 transitions. [2021-11-09 08:36:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:36:12,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:12,850 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 08:36:12,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:13,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:36:13,068 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1321889269, now seen corresponding path program 1 times [2021-11-09 08:36:13,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:13,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114734064] [2021-11-09 08:36:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:13,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:13,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:13,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250305092] [2021-11-09 08:36:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:13,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:13,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:13,085 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:13,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:36:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:36:13,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:15,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:15,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114734064] [2021-11-09 08:36:15,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:15,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250305092] [2021-11-09 08:36:15,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250305092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:15,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:15,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 08:36:15,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702365411] [2021-11-09 08:36:15,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:36:15,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:36:15,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:36:15,113 INFO L87 Difference]: Start difference. First operand 549 states and 723 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:17,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:17,136 INFO L93 Difference]: Finished difference Result 725 states and 945 transitions. [2021-11-09 08:36:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:36:17,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 08:36:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:17,141 INFO L225 Difference]: With dead ends: 725 [2021-11-09 08:36:17,141 INFO L226 Difference]: Without dead ends: 717 [2021-11-09 08:36:17,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:36:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-11-09 08:36:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 582. [2021-11-09 08:36:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 577 states have (on average 1.318890814558059) internal successors, (761), 581 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 761 transitions. [2021-11-09 08:36:17,215 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 761 transitions. Word has length 43 [2021-11-09 08:36:17,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:17,215 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 761 transitions. [2021-11-09 08:36:17,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 761 transitions. [2021-11-09 08:36:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:36:17,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:17,217 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:17,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:17,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:36:17,433 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1565965267, now seen corresponding path program 1 times [2021-11-09 08:36:17,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:17,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715941435] [2021-11-09 08:36:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:17,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:17,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:17,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600728114] [2021-11-09 08:36:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:17,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:17,453 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:17,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 08:36:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:36:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:36:18,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:18,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715941435] [2021-11-09 08:36:18,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:18,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600728114] [2021-11-09 08:36:18,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600728114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:18,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:18,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:36:18,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240482812] [2021-11-09 08:36:18,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:36:18,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:18,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:36:18,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:18,190 INFO L87 Difference]: Start difference. First operand 582 states and 761 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:18,586 INFO L93 Difference]: Finished difference Result 770 states and 1014 transitions. [2021-11-09 08:36:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:36:18,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 08:36:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:18,590 INFO L225 Difference]: With dead ends: 770 [2021-11-09 08:36:18,591 INFO L226 Difference]: Without dead ends: 766 [2021-11-09 08:36:18,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-09 08:36:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 603. [2021-11-09 08:36:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 598 states have (on average 1.31438127090301) internal successors, (786), 602 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 786 transitions. [2021-11-09 08:36:18,671 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 786 transitions. Word has length 44 [2021-11-09 08:36:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:18,672 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 786 transitions. [2021-11-09 08:36:18,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 786 transitions. [2021-11-09 08:36:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:36:18,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:18,673 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-11-09 08:36:18,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-09 08:36:18,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:18,893 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash -15075340, now seen corresponding path program 1 times [2021-11-09 08:36:18,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:18,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745768662] [2021-11-09 08:36:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:18,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:18,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:18,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85675439] [2021-11-09 08:36:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:18,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:18,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:18,911 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:18,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 08:36:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:36:19,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:19,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:19,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745768662] [2021-11-09 08:36:19,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:19,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85675439] [2021-11-09 08:36:19,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85675439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:19,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:19,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:36:19,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934003504] [2021-11-09 08:36:19,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:36:19,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:36:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:36:19,650 INFO L87 Difference]: Start difference. First operand 603 states and 786 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:19,816 INFO L93 Difference]: Finished difference Result 1073 states and 1426 transitions. [2021-11-09 08:36:19,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:36:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-09 08:36:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:19,821 INFO L225 Difference]: With dead ends: 1073 [2021-11-09 08:36:19,821 INFO L226 Difference]: Without dead ends: 629 [2021-11-09 08:36:19,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:36:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-09 08:36:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 621. [2021-11-09 08:36:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 616 states have (on average 1.3084415584415585) internal successors, (806), 620 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 806 transitions. [2021-11-09 08:36:19,941 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 806 transitions. Word has length 44 [2021-11-09 08:36:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:19,941 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 806 transitions. [2021-11-09 08:36:19,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 806 transitions. [2021-11-09 08:36:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:36:19,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:19,943 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:19,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:20,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:20,160 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:20,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1214368663, now seen corresponding path program 2 times [2021-11-09 08:36:20,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:20,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224007458] [2021-11-09 08:36:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:20,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:20,181 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:20,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255092965] [2021-11-09 08:36:20,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:20,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:20,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:20,185 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:20,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 08:36:20,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:20,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:36:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:20,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:20,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224007458] [2021-11-09 08:36:20,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:20,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255092965] [2021-11-09 08:36:20,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255092965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:20,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:20,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:36:20,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978411140] [2021-11-09 08:36:20,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:36:20,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:36:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:20,995 INFO L87 Difference]: Start difference. First operand 621 states and 806 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:21,189 INFO L93 Difference]: Finished difference Result 1061 states and 1395 transitions. [2021-11-09 08:36:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:36:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:36:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:21,194 INFO L225 Difference]: With dead ends: 1061 [2021-11-09 08:36:21,194 INFO L226 Difference]: Without dead ends: 703 [2021-11-09 08:36:21,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:36:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-09 08:36:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 669. [2021-11-09 08:36:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 664 states have (on average 1.2966867469879517) internal successors, (861), 668 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 861 transitions. [2021-11-09 08:36:21,317 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 861 transitions. Word has length 45 [2021-11-09 08:36:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:21,317 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 861 transitions. [2021-11-09 08:36:21,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 861 transitions. [2021-11-09 08:36:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:36:21,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:21,322 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:21,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:21,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:21,541 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1653911024, now seen corresponding path program 1 times [2021-11-09 08:36:21,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:21,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349667307] [2021-11-09 08:36:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:21,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:21,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:21,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823616560] [2021-11-09 08:36:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:21,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:21,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:21,559 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:21,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 08:36:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:22,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:36:22,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:23,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:23,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349667307] [2021-11-09 08:36:23,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:23,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823616560] [2021-11-09 08:36:23,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823616560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:23,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:23,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 08:36:23,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534685010] [2021-11-09 08:36:23,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:36:23,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:23,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:36:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:36:23,684 INFO L87 Difference]: Start difference. First operand 669 states and 861 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:24,469 INFO L93 Difference]: Finished difference Result 827 states and 1055 transitions. [2021-11-09 08:36:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:36:24,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:36:24,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:24,474 INFO L225 Difference]: With dead ends: 827 [2021-11-09 08:36:24,474 INFO L226 Difference]: Without dead ends: 825 [2021-11-09 08:36:24,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:36:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-09 08:36:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 665. [2021-11-09 08:36:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 660 states have (on average 1.2984848484848486) internal successors, (857), 664 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 857 transitions. [2021-11-09 08:36:24,578 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 857 transitions. Word has length 46 [2021-11-09 08:36:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:24,578 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 857 transitions. [2021-11-09 08:36:24,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 857 transitions. [2021-11-09 08:36:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:36:24,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:24,580 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:24,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:24,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:24,793 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash -927382991, now seen corresponding path program 1 times [2021-11-09 08:36:24,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:24,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739503540] [2021-11-09 08:36:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:24,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:24,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:24,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835166633] [2021-11-09 08:36:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:24,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:24,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:24,810 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:24,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 08:36:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:36:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:25,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:25,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739503540] [2021-11-09 08:36:25,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:25,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835166633] [2021-11-09 08:36:25,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835166633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:25,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:25,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:36:25,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88332803] [2021-11-09 08:36:25,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:36:25,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:36:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:25,691 INFO L87 Difference]: Start difference. First operand 665 states and 857 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:25,850 INFO L93 Difference]: Finished difference Result 711 states and 902 transitions. [2021-11-09 08:36:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:36:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 08:36:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:25,854 INFO L225 Difference]: With dead ends: 711 [2021-11-09 08:36:25,854 INFO L226 Difference]: Without dead ends: 707 [2021-11-09 08:36:25,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:36:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-09 08:36:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 683. [2021-11-09 08:36:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.2935103244837758) internal successors, (877), 682 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 877 transitions. [2021-11-09 08:36:25,953 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 877 transitions. Word has length 49 [2021-11-09 08:36:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:25,954 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 877 transitions. [2021-11-09 08:36:25,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 877 transitions. [2021-11-09 08:36:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:36:25,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:25,955 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:25,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:26,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 08:36:26,182 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:26,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:26,182 INFO L85 PathProgramCache]: Analyzing trace with hash -41471547, now seen corresponding path program 2 times [2021-11-09 08:36:26,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:26,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342064324] [2021-11-09 08:36:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:26,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:26,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:26,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953581695] [2021-11-09 08:36:26,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:26,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:26,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:26,217 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:26,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 08:36:26,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:26,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:36:26,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:27,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:27,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342064324] [2021-11-09 08:36:27,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:27,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953581695] [2021-11-09 08:36:27,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953581695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:27,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:27,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:36:27,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791113314] [2021-11-09 08:36:27,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:36:27,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:36:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:27,388 INFO L87 Difference]: Start difference. First operand 683 states and 877 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:28,303 INFO L93 Difference]: Finished difference Result 1333 states and 1723 transitions. [2021-11-09 08:36:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:36:28,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 08:36:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:28,309 INFO L225 Difference]: With dead ends: 1333 [2021-11-09 08:36:28,310 INFO L226 Difference]: Without dead ends: 1331 [2021-11-09 08:36:28,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:36:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-11-09 08:36:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 713. [2021-11-09 08:36:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 708 states have (on average 1.2937853107344632) internal successors, (916), 712 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 916 transitions. [2021-11-09 08:36:28,451 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 916 transitions. Word has length 49 [2021-11-09 08:36:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:28,451 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 916 transitions. [2021-11-09 08:36:28,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 916 transitions. [2021-11-09 08:36:28,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:36:28,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:28,453 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-09 08:36:28,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:28,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 08:36:28,653 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1315150752, now seen corresponding path program 2 times [2021-11-09 08:36:28,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:28,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223320178] [2021-11-09 08:36:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:28,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:28,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:28,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752454341] [2021-11-09 08:36:28,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:28,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:28,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:28,671 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:28,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 08:36:29,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:29,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-09 08:36:29,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:30,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:30,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223320178] [2021-11-09 08:36:30,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:30,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752454341] [2021-11-09 08:36:30,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752454341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:30,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:30,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-09 08:36:30,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912337737] [2021-11-09 08:36:30,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:36:30,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:30,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:36:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:36:30,895 INFO L87 Difference]: Start difference. First operand 713 states and 916 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:32,012 INFO L93 Difference]: Finished difference Result 1032 states and 1329 transitions. [2021-11-09 08:36:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:36:32,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 08:36:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:32,018 INFO L225 Difference]: With dead ends: 1032 [2021-11-09 08:36:32,018 INFO L226 Difference]: Without dead ends: 1024 [2021-11-09 08:36:32,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:36:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-09 08:36:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 745. [2021-11-09 08:36:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 740 states have (on average 1.2891891891891891) internal successors, (954), 744 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 954 transitions. [2021-11-09 08:36:32,102 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 954 transitions. Word has length 50 [2021-11-09 08:36:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:32,102 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 954 transitions. [2021-11-09 08:36:32,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 954 transitions. [2021-11-09 08:36:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:36:32,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:32,104 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-11-09 08:36:32,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-09 08:36:32,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 08:36:32,313 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:32,314 INFO L85 PathProgramCache]: Analyzing trace with hash -223969367, now seen corresponding path program 2 times [2021-11-09 08:36:32,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:32,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614490374] [2021-11-09 08:36:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:32,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:32,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:32,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574237413] [2021-11-09 08:36:32,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:32,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:32,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:32,336 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:32,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 08:36:33,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:36:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:33,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:33,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614490374] [2021-11-09 08:36:33,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:33,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574237413] [2021-11-09 08:36:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574237413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:33,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:33,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:36:33,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166325116] [2021-11-09 08:36:33,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:36:33,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:33,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:36:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:36:33,372 INFO L87 Difference]: Start difference. First operand 745 states and 954 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:33,614 INFO L93 Difference]: Finished difference Result 1348 states and 1753 transitions. [2021-11-09 08:36:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:36:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-09 08:36:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:33,618 INFO L225 Difference]: With dead ends: 1348 [2021-11-09 08:36:33,618 INFO L226 Difference]: Without dead ends: 874 [2021-11-09 08:36:33,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:36:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-11-09 08:36:33,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 834. [2021-11-09 08:36:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.270205066344994) internal successors, (1053), 833 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1053 transitions. [2021-11-09 08:36:33,735 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1053 transitions. Word has length 51 [2021-11-09 08:36:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:33,735 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1053 transitions. [2021-11-09 08:36:33,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1053 transitions. [2021-11-09 08:36:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:36:33,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:33,737 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:33,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:33,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:33,944 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:33,944 INFO L85 PathProgramCache]: Analyzing trace with hash 780160965, now seen corresponding path program 3 times [2021-11-09 08:36:33,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:33,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046391069] [2021-11-09 08:36:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:33,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:33,964 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:33,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479164778] [2021-11-09 08:36:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:36:33,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:33,969 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:33,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 08:36:34,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:36:34,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:36:34,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 08:36:36,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:36,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046391069] [2021-11-09 08:36:36,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:36,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479164778] [2021-11-09 08:36:36,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479164778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:36,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:36,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:36:36,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252082543] [2021-11-09 08:36:36,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:36:36,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:36:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:36,800 INFO L87 Difference]: Start difference. First operand 834 states and 1053 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:43,679 WARN L207 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-11-09 08:36:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:49,148 INFO L93 Difference]: Finished difference Result 868 states and 1095 transitions. [2021-11-09 08:36:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:36:49,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 08:36:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:49,154 INFO L225 Difference]: With dead ends: 868 [2021-11-09 08:36:49,154 INFO L226 Difference]: Without dead ends: 866 [2021-11-09 08:36:49,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:36:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-11-09 08:36:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 670. [2021-11-09 08:36:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 666 states have (on average 1.2597597597597598) internal successors, (839), 669 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 839 transitions. [2021-11-09 08:36:49,280 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 839 transitions. Word has length 52 [2021-11-09 08:36:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:49,280 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 839 transitions. [2021-11-09 08:36:49,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 839 transitions. [2021-11-09 08:36:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:36:49,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:49,282 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:49,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:49,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 08:36:49,497 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1601103788, now seen corresponding path program 2 times [2021-11-09 08:36:49,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:49,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621969603] [2021-11-09 08:36:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:49,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:49,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:49,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436597865] [2021-11-09 08:36:49,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:49,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:49,512 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:49,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 08:36:50,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:50,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:36:50,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:50,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:50,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621969603] [2021-11-09 08:36:50,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:50,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436597865] [2021-11-09 08:36:50,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436597865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:50,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:50,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:36:50,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774974519] [2021-11-09 08:36:50,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:36:50,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:50,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:36:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:36:50,887 INFO L87 Difference]: Start difference. First operand 670 states and 839 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:51,144 INFO L93 Difference]: Finished difference Result 709 states and 877 transitions. [2021-11-09 08:36:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:36:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 08:36:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:51,149 INFO L225 Difference]: With dead ends: 709 [2021-11-09 08:36:51,150 INFO L226 Difference]: Without dead ends: 705 [2021-11-09 08:36:51,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:36:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-09 08:36:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 674. [2021-11-09 08:36:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 670 states have (on average 1.2582089552238807) internal successors, (843), 673 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 843 transitions. [2021-11-09 08:36:51,267 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 843 transitions. Word has length 53 [2021-11-09 08:36:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:51,268 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 843 transitions. [2021-11-09 08:36:51,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 843 transitions. [2021-11-09 08:36:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:36:51,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:51,269 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:51,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:51,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 08:36:51,478 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1015954848, now seen corresponding path program 3 times [2021-11-09 08:36:51,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:51,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084156308] [2021-11-09 08:36:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:51,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:51,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:51,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636945071] [2021-11-09 08:36:51,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:36:51,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:51,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:51,521 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:51,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 08:36:52,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:36:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:52,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:36:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 08:36:53,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:53,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084156308] [2021-11-09 08:36:53,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:53,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636945071] [2021-11-09 08:36:53,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636945071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:53,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:53,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:36:53,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826389294] [2021-11-09 08:36:53,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:36:53,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:36:53,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:53,710 INFO L87 Difference]: Start difference. First operand 674 states and 843 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:54,663 INFO L93 Difference]: Finished difference Result 986 states and 1240 transitions. [2021-11-09 08:36:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:36:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 08:36:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:54,670 INFO L225 Difference]: With dead ends: 986 [2021-11-09 08:36:54,670 INFO L226 Difference]: Without dead ends: 978 [2021-11-09 08:36:54,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:36:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-09 08:36:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 718. [2021-11-09 08:36:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 714 states have (on average 1.2549019607843137) internal successors, (896), 717 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 896 transitions. [2021-11-09 08:36:54,832 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 896 transitions. Word has length 53 [2021-11-09 08:36:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:54,833 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 896 transitions. [2021-11-09 08:36:54,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 896 transitions. [2021-11-09 08:36:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:36:54,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:54,835 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2021-11-09 08:36:54,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:55,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 08:36:55,049 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash -474089570, now seen corresponding path program 1 times [2021-11-09 08:36:55,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:55,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872678890] [2021-11-09 08:36:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:55,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:55,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:55,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378345563] [2021-11-09 08:36:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:55,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:55,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:55,066 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:55,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 08:36:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:56,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:36:56,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:56,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:56,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872678890] [2021-11-09 08:36:56,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:36:56,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378345563] [2021-11-09 08:36:56,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378345563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:56,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:36:56,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:36:56,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697807439] [2021-11-09 08:36:56,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:36:56,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:36:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:36:56,431 INFO L87 Difference]: Start difference. First operand 718 states and 896 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:56,619 INFO L93 Difference]: Finished difference Result 1112 states and 1429 transitions. [2021-11-09 08:36:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:36:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-09 08:36:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:56,623 INFO L225 Difference]: With dead ends: 1112 [2021-11-09 08:36:56,624 INFO L226 Difference]: Without dead ends: 756 [2021-11-09 08:36:56,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:36:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-09 08:36:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 746. [2021-11-09 08:36:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 742 states have (on average 1.2452830188679245) internal successors, (924), 745 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 924 transitions. [2021-11-09 08:36:56,752 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 924 transitions. Word has length 55 [2021-11-09 08:36:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:56,753 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 924 transitions. [2021-11-09 08:36:56,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 924 transitions. [2021-11-09 08:36:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 08:36:56,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:56,755 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:56,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:56,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 08:36:56,969 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:36:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:56,970 INFO L85 PathProgramCache]: Analyzing trace with hash 766336805, now seen corresponding path program 4 times [2021-11-09 08:36:56,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:56,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126703303] [2021-11-09 08:36:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:56,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:56,983 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:36:56,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768415098] [2021-11-09 08:36:56,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:36:56,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:56,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:56,985 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:56,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 08:36:57,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:36:57,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:57,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-09 08:36:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:00,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:00,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126703303] [2021-11-09 08:37:00,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:37:00,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768415098] [2021-11-09 08:37:00,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768415098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:00,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:37:00,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 08:37:00,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915546063] [2021-11-09 08:37:00,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:37:00,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:00,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:37:00,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:37:00,222 INFO L87 Difference]: Start difference. First operand 746 states and 924 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:01,732 INFO L93 Difference]: Finished difference Result 1148 states and 1444 transitions. [2021-11-09 08:37:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:37:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 08:37:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:01,737 INFO L225 Difference]: With dead ends: 1148 [2021-11-09 08:37:01,737 INFO L226 Difference]: Without dead ends: 912 [2021-11-09 08:37:01,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:37:01,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-11-09 08:37:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 724. [2021-11-09 08:37:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 720 states have (on average 1.2472222222222222) internal successors, (898), 723 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 898 transitions. [2021-11-09 08:37:01,876 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 898 transitions. Word has length 57 [2021-11-09 08:37:01,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:01,876 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 898 transitions. [2021-11-09 08:37:01,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 898 transitions. [2021-11-09 08:37:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:37:01,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:01,878 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:01,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-09 08:37:02,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:02,094 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:37:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2113709863, now seen corresponding path program 3 times [2021-11-09 08:37:02,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:02,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267196063] [2021-11-09 08:37:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:02,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:02,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:37:02,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004768074] [2021-11-09 08:37:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:37:02,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:02,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:02,112 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:02,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 08:37:04,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:37:04,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:37:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:04,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:04,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267196063] [2021-11-09 08:37:04,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:37:04,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004768074] [2021-11-09 08:37:04,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004768074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:04,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:37:04,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 08:37:04,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991863446] [2021-11-09 08:37:04,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:37:04,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:37:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:37:04,276 INFO L87 Difference]: Start difference. First operand 724 states and 898 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:04,629 INFO L93 Difference]: Finished difference Result 1187 states and 1512 transitions. [2021-11-09 08:37:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:37:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-09 08:37:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:04,635 INFO L225 Difference]: With dead ends: 1187 [2021-11-09 08:37:04,635 INFO L226 Difference]: Without dead ends: 831 [2021-11-09 08:37:04,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:37:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-09 08:37:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 770. [2021-11-09 08:37:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 766 states have (on average 1.2428198433420365) internal successors, (952), 769 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 952 transitions. [2021-11-09 08:37:04,810 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 952 transitions. Word has length 59 [2021-11-09 08:37:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:04,812 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 952 transitions. [2021-11-09 08:37:04,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 952 transitions. [2021-11-09 08:37:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:37:04,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:04,815 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:04,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:05,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 08:37:05,027 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:37:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash 469187479, now seen corresponding path program 3 times [2021-11-09 08:37:05,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:05,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830352550] [2021-11-09 08:37:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:05,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:05,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:37:05,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467661222] [2021-11-09 08:37:05,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:37:05,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:05,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:05,044 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:05,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 08:37:06,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:37:06,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:37:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:06,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:06,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830352550] [2021-11-09 08:37:06,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:37:06,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467661222] [2021-11-09 08:37:06,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467661222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:06,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:37:06,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 08:37:06,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141198651] [2021-11-09 08:37:06,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:37:06,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:37:06,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:37:06,648 INFO L87 Difference]: Start difference. First operand 770 states and 952 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:06,957 INFO L93 Difference]: Finished difference Result 961 states and 1173 transitions. [2021-11-09 08:37:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:37:06,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-09 08:37:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:06,962 INFO L225 Difference]: With dead ends: 961 [2021-11-09 08:37:06,962 INFO L226 Difference]: Without dead ends: 957 [2021-11-09 08:37:06,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:37:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-09 08:37:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 788. [2021-11-09 08:37:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 784 states have (on average 1.2410714285714286) internal successors, (973), 787 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 973 transitions. [2021-11-09 08:37:07,146 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 973 transitions. Word has length 60 [2021-11-09 08:37:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:07,146 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 973 transitions. [2021-11-09 08:37:07,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 973 transitions. [2021-11-09 08:37:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:37:07,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:07,147 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:07,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:07,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 08:37:07,350 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:37:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:07,350 INFO L85 PathProgramCache]: Analyzing trace with hash -115961461, now seen corresponding path program 5 times [2021-11-09 08:37:07,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:07,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453991831] [2021-11-09 08:37:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:07,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:07,365 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:37:07,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791880594] [2021-11-09 08:37:07,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:37:07,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:07,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:07,367 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:07,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 08:37:08,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:37:08,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:08,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-09 08:37:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:38,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:38,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453991831] [2021-11-09 08:37:38,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:37:38,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791880594] [2021-11-09 08:37:38,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791880594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:38,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:37:38,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 08:37:38,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35554199] [2021-11-09 08:37:38,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:37:38,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:38,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:37:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:37:38,023 INFO L87 Difference]: Start difference. First operand 788 states and 973 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:48,651 WARN L207 SmtUtils]: Spent 7.50 s on a formula simplification that was a NOOP. DAG size: 88 [2021-11-09 08:37:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:57,502 INFO L93 Difference]: Finished difference Result 1054 states and 1300 transitions. [2021-11-09 08:37:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:37:57,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-09 08:37:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:57,509 INFO L225 Difference]: With dead ends: 1054 [2021-11-09 08:37:57,510 INFO L226 Difference]: Without dead ends: 1046 [2021-11-09 08:37:57,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:37:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-11-09 08:37:57,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 788. [2021-11-09 08:37:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 784 states have (on average 1.239795918367347) internal successors, (972), 787 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 972 transitions. [2021-11-09 08:37:57,726 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 972 transitions. Word has length 60 [2021-11-09 08:37:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:57,726 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 972 transitions. [2021-11-09 08:37:57,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 972 transitions. [2021-11-09 08:37:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:37:57,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:57,729 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:57,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:57,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:57,943 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:37:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1678458784, now seen corresponding path program 2 times [2021-11-09 08:37:57,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:57,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627017848] [2021-11-09 08:37:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:57,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:57,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:37:57,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166093334] [2021-11-09 08:37:57,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:37:57,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:57,960 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:57,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 08:37:59,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:37:59,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-09 08:37:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:02,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:02,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627017848] [2021-11-09 08:38:02,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:38:02,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166093334] [2021-11-09 08:38:02,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166093334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:02,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:02,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 08:38:02,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703500953] [2021-11-09 08:38:02,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:38:02,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:38:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:38:02,356 INFO L87 Difference]: Start difference. First operand 788 states and 972 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:04,221 INFO L93 Difference]: Finished difference Result 1042 states and 1288 transitions. [2021-11-09 08:38:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:38:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-09 08:38:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:04,226 INFO L225 Difference]: With dead ends: 1042 [2021-11-09 08:38:04,226 INFO L226 Difference]: Without dead ends: 1040 [2021-11-09 08:38:04,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:38:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-09 08:38:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 780. [2021-11-09 08:38:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 776 states have (on average 1.2422680412371134) internal successors, (964), 779 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 964 transitions. [2021-11-09 08:38:04,418 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 964 transitions. Word has length 60 [2021-11-09 08:38:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:04,418 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 964 transitions. [2021-11-09 08:38:04,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 964 transitions. [2021-11-09 08:38:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:38:04,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:04,420 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 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] [2021-11-09 08:38:04,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-09 08:38:04,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:04,627 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:38:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:04,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1933621548, now seen corresponding path program 1 times [2021-11-09 08:38:04,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:04,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574746974] [2021-11-09 08:38:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:04,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:04,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:38:04,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475037226] [2021-11-09 08:38:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:04,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:04,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:04,667 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:04,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 08:38:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:06,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:38:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:06,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:06,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574746974] [2021-11-09 08:38:06,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:38:06,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475037226] [2021-11-09 08:38:06,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475037226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:06,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:06,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 08:38:06,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596111065] [2021-11-09 08:38:06,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:38:06,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:38:06,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:38:06,640 INFO L87 Difference]: Start difference. First operand 780 states and 964 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:07,072 INFO L93 Difference]: Finished difference Result 1243 states and 1583 transitions. [2021-11-09 08:38:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:38:07,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 08:38:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:07,077 INFO L225 Difference]: With dead ends: 1243 [2021-11-09 08:38:07,077 INFO L226 Difference]: Without dead ends: 841 [2021-11-09 08:38:07,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:38:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-11-09 08:38:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 817. [2021-11-09 08:38:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.2349323493234932) internal successors, (1004), 816 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1004 transitions. [2021-11-09 08:38:07,275 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1004 transitions. Word has length 61 [2021-11-09 08:38:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:07,275 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1004 transitions. [2021-11-09 08:38:07,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1004 transitions. [2021-11-09 08:38:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 08:38:07,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:07,278 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:07,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:07,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 08:38:07,485 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:38:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash 79938960, now seen corresponding path program 6 times [2021-11-09 08:38:07,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:07,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821642329] [2021-11-09 08:38:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:07,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:07,502 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:38:07,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453892285] [2021-11-09 08:38:07,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:38:07,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:07,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:07,504 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:07,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 08:38:09,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:38:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-09 08:38:09,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:13,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:13,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821642329] [2021-11-09 08:38:13,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:38:13,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453892285] [2021-11-09 08:38:13,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453892285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:13,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:13,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 08:38:13,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971829719] [2021-11-09 08:38:13,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:38:13,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:13,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:38:13,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:38:13,165 INFO L87 Difference]: Start difference. First operand 817 states and 1004 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:16,167 INFO L93 Difference]: Finished difference Result 1516 states and 1919 transitions. [2021-11-09 08:38:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:38:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-09 08:38:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:16,173 INFO L225 Difference]: With dead ends: 1516 [2021-11-09 08:38:16,173 INFO L226 Difference]: Without dead ends: 1123 [2021-11-09 08:38:16,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:38:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-11-09 08:38:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 827. [2021-11-09 08:38:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 823 states have (on average 1.2320777642770353) internal successors, (1014), 826 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1014 transitions. [2021-11-09 08:38:16,349 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1014 transitions. Word has length 64 [2021-11-09 08:38:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:16,349 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1014 transitions. [2021-11-09 08:38:16,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1014 transitions. [2021-11-09 08:38:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 08:38:16,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:16,351 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:16,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:16,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 08:38:16,573 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:38:16,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1053671120, now seen corresponding path program 7 times [2021-11-09 08:38:16,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:16,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320775689] [2021-11-09 08:38:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:16,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:16,593 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:38:16,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202466586] [2021-11-09 08:38:16,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:38:16,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:16,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:16,595 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:16,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 08:38:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:18,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-09 08:38:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:21,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:21,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320775689] [2021-11-09 08:38:21,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:38:21,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202466586] [2021-11-09 08:38:21,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202466586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:21,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:21,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 08:38:21,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460237841] [2021-11-09 08:38:21,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:38:21,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:21,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:38:21,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:38:21,463 INFO L87 Difference]: Start difference. First operand 827 states and 1014 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:23,685 INFO L93 Difference]: Finished difference Result 1141 states and 1402 transitions. [2021-11-09 08:38:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:38:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-09 08:38:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:23,692 INFO L225 Difference]: With dead ends: 1141 [2021-11-09 08:38:23,692 INFO L226 Difference]: Without dead ends: 1133 [2021-11-09 08:38:23,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:38:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-11-09 08:38:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 837. [2021-11-09 08:38:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 833 states have (on average 1.2304921968787514) internal successors, (1025), 836 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1025 transitions. [2021-11-09 08:38:23,837 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1025 transitions. Word has length 64 [2021-11-09 08:38:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:23,838 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1025 transitions. [2021-11-09 08:38:23,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1025 transitions. [2021-11-09 08:38:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 08:38:23,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:23,840 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:23,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:24,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 08:38:24,041 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:38:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:24,042 INFO L85 PathProgramCache]: Analyzing trace with hash -643003367, now seen corresponding path program 3 times [2021-11-09 08:38:24,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:24,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233047176] [2021-11-09 08:38:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:24,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:24,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:38:24,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439385925] [2021-11-09 08:38:24,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:38:24,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:24,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:24,088 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:24,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 08:38:25,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:38:25,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:25,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:38:25,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:26,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:26,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233047176] [2021-11-09 08:38:26,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:38:26,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439385925] [2021-11-09 08:38:26,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439385925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:26,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:26,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 08:38:26,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067152435] [2021-11-09 08:38:26,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:38:26,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:26,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:38:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:38:26,223 INFO L87 Difference]: Start difference. First operand 837 states and 1025 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:26,686 INFO L93 Difference]: Finished difference Result 1367 states and 1720 transitions. [2021-11-09 08:38:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:38:26,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 08:38:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:26,690 INFO L225 Difference]: With dead ends: 1367 [2021-11-09 08:38:26,690 INFO L226 Difference]: Without dead ends: 965 [2021-11-09 08:38:26,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:38:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-09 08:38:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 915. [2021-11-09 08:38:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 911 states have (on average 1.220636663007684) internal successors, (1112), 914 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1112 transitions. [2021-11-09 08:38:26,948 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1112 transitions. Word has length 65 [2021-11-09 08:38:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:26,949 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1112 transitions. [2021-11-09 08:38:26,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1112 transitions. [2021-11-09 08:38:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:38:26,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:26,951 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:26,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:27,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 08:38:27,177 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:38:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash 412667012, now seen corresponding path program 4 times [2021-11-09 08:38:27,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:27,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680035331] [2021-11-09 08:38:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:27,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:27,195 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:38:27,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010704201] [2021-11-09 08:38:27,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:38:27,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:27,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:27,197 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:27,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 08:38:28,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:38:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 08:38:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:29,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:29,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680035331] [2021-11-09 08:38:29,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:38:29,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010704201] [2021-11-09 08:38:29,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010704201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:29,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:29,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 08:38:29,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471996929] [2021-11-09 08:38:29,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:38:29,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:38:29,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:38:29,366 INFO L87 Difference]: Start difference. First operand 915 states and 1112 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:29,896 INFO L93 Difference]: Finished difference Result 1470 states and 1833 transitions. [2021-11-09 08:38:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:38:29,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-09 08:38:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:29,899 INFO L225 Difference]: With dead ends: 1470 [2021-11-09 08:38:29,899 INFO L226 Difference]: Without dead ends: 1114 [2021-11-09 08:38:29,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:38:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-11-09 08:38:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1002. [2021-11-09 08:38:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 998 states have (on average 1.2154308617234468) internal successors, (1213), 1001 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1213 transitions. [2021-11-09 08:38:30,103 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1213 transitions. Word has length 66 [2021-11-09 08:38:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:30,103 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1213 transitions. [2021-11-09 08:38:30,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1213 transitions. [2021-11-09 08:38:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 08:38:30,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:30,105 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:30,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:30,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:30,313 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:38:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:30,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1539554645, now seen corresponding path program 3 times [2021-11-09 08:38:30,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:30,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268515650] [2021-11-09 08:38:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:30,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:30,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:38:30,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122275838] [2021-11-09 08:38:30,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:38:30,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:30,331 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:30,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 08:38:32,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:38:32,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:32,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 08:38:32,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-09 08:38:33,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:33,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268515650] [2021-11-09 08:38:33,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:38:33,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122275838] [2021-11-09 08:38:33,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122275838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:33,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:33,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 08:38:33,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228942795] [2021-11-09 08:38:33,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:38:33,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:38:33,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:38:33,453 INFO L87 Difference]: Start difference. First operand 1002 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:12,969 INFO L93 Difference]: Finished difference Result 1619 states and 1989 transitions. [2021-11-09 08:39:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:39:12,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 08:39:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:12,972 INFO L225 Difference]: With dead ends: 1619 [2021-11-09 08:39:12,973 INFO L226 Difference]: Without dead ends: 1617 [2021-11-09 08:39:12,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=192, Invalid=670, Unknown=8, NotChecked=0, Total=870 [2021-11-09 08:39:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-11-09 08:39:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1027. [2021-11-09 08:39:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1023 states have (on average 1.2228739002932552) internal successors, (1251), 1026 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1251 transitions. [2021-11-09 08:39:13,297 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1251 transitions. Word has length 67 [2021-11-09 08:39:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:13,298 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 1251 transitions. [2021-11-09 08:39:13,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1251 transitions. [2021-11-09 08:39:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 08:39:13,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:13,300 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:13,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-09 08:39:13,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:13,501 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:39:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1163204720, now seen corresponding path program 8 times [2021-11-09 08:39:13,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:13,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80656729] [2021-11-09 08:39:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:13,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:13,550 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:39:13,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254948274] [2021-11-09 08:39:13,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:39:13,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:13,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:13,551 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:13,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 08:39:15,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:39:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-09 08:39:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:20,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:20,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80656729] [2021-11-09 08:39:20,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:39:20,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254948274] [2021-11-09 08:39:20,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254948274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:20,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:39:20,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 08:39:20,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22078938] [2021-11-09 08:39:20,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:20,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:20,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:20,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:20,593 INFO L87 Difference]: Start difference. First operand 1027 states and 1251 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:24,568 INFO L93 Difference]: Finished difference Result 1252 states and 1508 transitions. [2021-11-09 08:39:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:39:24,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 08:39:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:24,571 INFO L225 Difference]: With dead ends: 1252 [2021-11-09 08:39:24,572 INFO L226 Difference]: Without dead ends: 1246 [2021-11-09 08:39:24,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:39:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-11-09 08:39:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1011. [2021-11-09 08:39:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1007 states have (on average 1.224428997020854) internal successors, (1233), 1010 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1233 transitions. [2021-11-09 08:39:24,847 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1233 transitions. Word has length 67 [2021-11-09 08:39:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:24,847 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 1233 transitions. [2021-11-09 08:39:24,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1233 transitions. [2021-11-09 08:39:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 08:39:24,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:24,849 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:24,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:25,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 08:39:25,050 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:39:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:25,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2082755788, now seen corresponding path program 2 times [2021-11-09 08:39:25,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:25,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925916008] [2021-11-09 08:39:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:25,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:25,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:39:25,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510454243] [2021-11-09 08:39:25,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:39:25,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:25,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:25,074 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:25,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 08:39:27,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:39:27,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:27,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 08:39:27,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:27,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:27,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925916008] [2021-11-09 08:39:27,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:39:27,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510454243] [2021-11-09 08:39:27,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510454243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:27,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:39:27,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 08:39:27,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418879597] [2021-11-09 08:39:27,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:39:27,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:27,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:39:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:39:27,806 INFO L87 Difference]: Start difference. First operand 1011 states and 1233 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:28,415 INFO L93 Difference]: Finished difference Result 1095 states and 1320 transitions. [2021-11-09 08:39:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:39:28,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-09 08:39:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:28,420 INFO L225 Difference]: With dead ends: 1095 [2021-11-09 08:39:28,420 INFO L226 Difference]: Without dead ends: 1091 [2021-11-09 08:39:28,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:39:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-11-09 08:39:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1047. [2021-11-09 08:39:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1043 states have (on average 1.2195589645254075) internal successors, (1272), 1046 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1272 transitions. [2021-11-09 08:39:28,697 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1272 transitions. Word has length 70 [2021-11-09 08:39:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:28,698 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1272 transitions. [2021-11-09 08:39:28,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:28,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1272 transitions. [2021-11-09 08:39:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 08:39:28,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:28,700 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:28,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:28,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:28,913 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:39:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash -95724106, now seen corresponding path program 9 times [2021-11-09 08:39:28,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:28,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458019358] [2021-11-09 08:39:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:28,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:28,964 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:39:28,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881241718] [2021-11-09 08:39:28,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:39:28,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:28,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:28,966 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:28,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 08:39:31,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:39:31,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:31,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 08:39:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:39:34,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:34,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458019358] [2021-11-09 08:39:34,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:39:34,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881241718] [2021-11-09 08:39:34,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881241718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:34,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:39:34,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 08:39:34,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457550376] [2021-11-09 08:39:34,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:39:34,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:39:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:39:34,190 INFO L87 Difference]: Start difference. First operand 1047 states and 1272 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:35,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:35,704 INFO L93 Difference]: Finished difference Result 1601 states and 1950 transitions. [2021-11-09 08:39:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:39:35,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 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 70 [2021-11-09 08:39:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:35,707 INFO L225 Difference]: With dead ends: 1601 [2021-11-09 08:39:35,707 INFO L226 Difference]: Without dead ends: 1593 [2021-11-09 08:39:35,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:39:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-11-09 08:39:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1091. [2021-11-09 08:39:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1087 states have (on average 1.2152713891444342) internal successors, (1321), 1090 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1321 transitions. [2021-11-09 08:39:36,009 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1321 transitions. Word has length 70 [2021-11-09 08:39:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:36,009 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1321 transitions. [2021-11-09 08:39:36,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1321 transitions. [2021-11-09 08:39:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:39:36,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:36,011 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:36,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:36,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:36,225 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:39:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash 140172389, now seen corresponding path program 10 times [2021-11-09 08:39:36,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:36,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948741512] [2021-11-09 08:39:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:36,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:36,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:39:36,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286746802] [2021-11-09 08:39:36,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:39:36,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:36,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:36,248 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:36,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 08:39:38,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:39:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:38,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-09 08:39:38,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:50,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:50,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948741512] [2021-11-09 08:39:50,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:39:50,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286746802] [2021-11-09 08:39:50,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286746802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:50,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:39:50,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-09 08:39:50,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327233969] [2021-11-09 08:39:50,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:39:50,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:39:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:39:50,088 INFO L87 Difference]: Start difference. First operand 1091 states and 1321 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:11,356 INFO L93 Difference]: Finished difference Result 1514 states and 1836 transitions. [2021-11-09 08:40:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:40:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 08:40:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:11,361 INFO L225 Difference]: With dead ends: 1514 [2021-11-09 08:40:11,361 INFO L226 Difference]: Without dead ends: 1506 [2021-11-09 08:40:11,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:40:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-09 08:40:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1118. [2021-11-09 08:40:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1114 states have (on average 1.2118491921005385) internal successors, (1350), 1117 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1350 transitions. [2021-11-09 08:40:11,865 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1350 transitions. Word has length 71 [2021-11-09 08:40:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:11,865 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 1350 transitions. [2021-11-09 08:40:11,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1350 transitions. [2021-11-09 08:40:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 08:40:11,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:11,867 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:11,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:12,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 08:40:12,093 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:40:12,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:12,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2006407044, now seen corresponding path program 4 times [2021-11-09 08:40:12,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:12,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136674595] [2021-11-09 08:40:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:12,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:12,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:40:12,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303698964] [2021-11-09 08:40:12,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:40:12,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:12,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:12,121 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:12,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 08:40:14,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:40:14,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:40:14,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:15,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:15,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136674595] [2021-11-09 08:40:15,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:40:15,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303698964] [2021-11-09 08:40:15,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303698964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:15,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:40:15,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 08:40:15,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994565271] [2021-11-09 08:40:15,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:40:15,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:40:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:40:15,498 INFO L87 Difference]: Start difference. First operand 1118 states and 1350 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:16,532 INFO L93 Difference]: Finished difference Result 1791 states and 2178 transitions. [2021-11-09 08:40:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:40:16,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-09 08:40:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:16,535 INFO L225 Difference]: With dead ends: 1791 [2021-11-09 08:40:16,536 INFO L226 Difference]: Without dead ends: 1787 [2021-11-09 08:40:16,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=549, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:40:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-11-09 08:40:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1447. [2021-11-09 08:40:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1443 states have (on average 1.218988218988219) internal successors, (1759), 1446 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 1759 transitions. [2021-11-09 08:40:17,022 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 1759 transitions. Word has length 72 [2021-11-09 08:40:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:17,023 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 1759 transitions. [2021-11-09 08:40:17,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 1759 transitions. [2021-11-09 08:40:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 08:40:17,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:17,025 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:17,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:17,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 08:40:17,241 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:40:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1995406277, now seen corresponding path program 11 times [2021-11-09 08:40:17,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:17,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650358332] [2021-11-09 08:40:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:17,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:17,317 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:40:17,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625205567] [2021-11-09 08:40:17,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:40:17,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:17,319 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:17,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 08:40:20,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 08:40:20,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:20,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-09 08:40:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:55,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:55,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650358332] [2021-11-09 08:40:55,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:40:55,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625205567] [2021-11-09 08:40:55,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625205567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:55,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:40:55,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 08:40:55,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491292905] [2021-11-09 08:40:55,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:40:55,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:55,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:40:55,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:40:55,120 INFO L87 Difference]: Start difference. First operand 1447 states and 1759 transitions. Second operand has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:02,818 INFO L93 Difference]: Finished difference Result 1807 states and 2188 transitions. [2021-11-09 08:41:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:41:02,819 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-09 08:41:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:02,823 INFO L225 Difference]: With dead ends: 1807 [2021-11-09 08:41:02,823 INFO L226 Difference]: Without dead ends: 1800 [2021-11-09 08:41:02,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:41:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2021-11-09 08:41:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 672. [2021-11-09 08:41:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 669 states have (on average 1.155455904334828) internal successors, (773), 671 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 773 transitions. [2021-11-09 08:41:03,128 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 773 transitions. Word has length 74 [2021-11-09 08:41:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:03,128 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 773 transitions. [2021-11-09 08:41:03,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 773 transitions. [2021-11-09 08:41:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:41:03,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:03,129 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:03,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:03,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:03,330 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:41:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:03,330 INFO L85 PathProgramCache]: Analyzing trace with hash 289257368, now seen corresponding path program 1 times [2021-11-09 08:41:03,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:03,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661541781] [2021-11-09 08:41:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:03,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:03,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:41:03,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617500262] [2021-11-09 08:41:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:03,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:03,353 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:03,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 08:41:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:41:05,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:06,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:06,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661541781] [2021-11-09 08:41:06,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:41:06,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617500262] [2021-11-09 08:41:06,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617500262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:06,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:41:06,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 08:41:06,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531969859] [2021-11-09 08:41:06,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:41:06,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:41:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:41:06,239 INFO L87 Difference]: Start difference. First operand 672 states and 773 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:06,933 INFO L93 Difference]: Finished difference Result 1012 states and 1191 transitions. [2021-11-09 08:41:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:41:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 08:41:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:06,934 INFO L225 Difference]: With dead ends: 1012 [2021-11-09 08:41:06,934 INFO L226 Difference]: Without dead ends: 825 [2021-11-09 08:41:06,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:41:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-09 08:41:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 785. [2021-11-09 08:41:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 782 states have (on average 1.149616368286445) internal successors, (899), 784 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 899 transitions. [2021-11-09 08:41:07,278 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 899 transitions. Word has length 75 [2021-11-09 08:41:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:07,278 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 899 transitions. [2021-11-09 08:41:07,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 899 transitions. [2021-11-09 08:41:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:41:07,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:07,280 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:07,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:07,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:07,480 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:41:07,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:07,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1139313186, now seen corresponding path program 1 times [2021-11-09 08:41:07,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:07,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106028938] [2021-11-09 08:41:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:07,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:07,503 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:41:07,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017626946] [2021-11-09 08:41:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:07,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:07,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:07,505 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:07,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 08:41:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:10,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:41:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 22 proven. 82 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:41:12,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:12,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106028938] [2021-11-09 08:41:12,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:41:12,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017626946] [2021-11-09 08:41:12,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017626946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:12,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:41:12,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 08:41:12,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956965493] [2021-11-09 08:41:12,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:41:12,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:41:12,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:41:12,072 INFO L87 Difference]: Start difference. First operand 785 states and 899 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:14,338 INFO L93 Difference]: Finished difference Result 1359 states and 1566 transitions. [2021-11-09 08:41:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:41:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 08:41:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:14,341 INFO L225 Difference]: With dead ends: 1359 [2021-11-09 08:41:14,341 INFO L226 Difference]: Without dead ends: 1357 [2021-11-09 08:41:14,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:41:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-11-09 08:41:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 939. [2021-11-09 08:41:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 936 states have (on average 1.1549145299145298) internal successors, (1081), 938 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1081 transitions. [2021-11-09 08:41:14,827 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1081 transitions. Word has length 75 [2021-11-09 08:41:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:14,827 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1081 transitions. [2021-11-09 08:41:14,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1081 transitions. [2021-11-09 08:41:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:41:14,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:14,828 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:14,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:15,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 08:41:15,029 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:41:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:15,029 INFO L85 PathProgramCache]: Analyzing trace with hash -555910120, now seen corresponding path program 2 times [2021-11-09 08:41:15,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:15,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669739818] [2021-11-09 08:41:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:15,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:15,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:41:15,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933530301] [2021-11-09 08:41:15,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:41:15,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:15,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:15,058 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:15,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 08:41:17,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:41:17,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:41:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 60 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:41:18,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:18,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669739818] [2021-11-09 08:41:18,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:41:18,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933530301] [2021-11-09 08:41:18,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933530301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:18,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:41:18,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:41:18,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574378407] [2021-11-09 08:41:18,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:41:18,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:41:18,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:41:18,785 INFO L87 Difference]: Start difference. First operand 939 states and 1081 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:20,277 INFO L93 Difference]: Finished difference Result 1442 states and 1666 transitions. [2021-11-09 08:41:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:41:20,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 08:41:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:20,279 INFO L225 Difference]: With dead ends: 1442 [2021-11-09 08:41:20,280 INFO L226 Difference]: Without dead ends: 1440 [2021-11-09 08:41:20,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:41:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-11-09 08:41:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 939. [2021-11-09 08:41:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 936 states have (on average 1.1549145299145298) internal successors, (1081), 938 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1081 transitions. [2021-11-09 08:41:20,811 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1081 transitions. Word has length 75 [2021-11-09 08:41:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:20,811 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1081 transitions. [2021-11-09 08:41:20,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1081 transitions. [2021-11-09 08:41:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 08:41:20,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:20,814 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:20,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:21,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:21,029 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:41:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:21,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1128933314, now seen corresponding path program 1 times [2021-11-09 08:41:21,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:21,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422538608] [2021-11-09 08:41:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:21,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:21,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:41:21,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751178631] [2021-11-09 08:41:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:21,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:21,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:21,066 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:21,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 08:41:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:24,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 08:41:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:32,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:32,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422538608] [2021-11-09 08:41:32,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:41:32,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751178631] [2021-11-09 08:41:32,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751178631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:32,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:41:32,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 08:41:32,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770767952] [2021-11-09 08:41:32,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:41:32,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:41:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:41:32,027 INFO L87 Difference]: Start difference. First operand 939 states and 1081 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:39,908 INFO L93 Difference]: Finished difference Result 1737 states and 2039 transitions. [2021-11-09 08:41:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:41:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-09 08:41:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:39,911 INFO L225 Difference]: With dead ends: 1737 [2021-11-09 08:41:39,911 INFO L226 Difference]: Without dead ends: 1396 [2021-11-09 08:41:39,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:41:39,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-11-09 08:41:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1037. [2021-11-09 08:41:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1034 states have (on average 1.1547388781431334) internal successors, (1194), 1036 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1194 transitions. [2021-11-09 08:41:40,665 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1194 transitions. Word has length 78 [2021-11-09 08:41:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:40,665 INFO L470 AbstractCegarLoop]: Abstraction has 1037 states and 1194 transitions. [2021-11-09 08:41:40,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1194 transitions. [2021-11-09 08:41:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 08:41:40,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:40,667 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:40,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-09 08:41:40,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:40,868 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:41:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash 738770390, now seen corresponding path program 1 times [2021-11-09 08:41:40,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:40,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031949215] [2021-11-09 08:41:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:40,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:40,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:41:40,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257036038] [2021-11-09 08:41:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:40,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:40,898 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:40,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 08:41:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-09 08:41:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:02,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:02,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031949215] [2021-11-09 08:42:02,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:42:02,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257036038] [2021-11-09 08:42:02,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257036038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:02,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:42:02,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-09 08:42:02,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314031166] [2021-11-09 08:42:02,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 08:42:02,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 08:42:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:42:02,165 INFO L87 Difference]: Start difference. First operand 1037 states and 1194 transitions. Second operand has 25 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:13,296 INFO L93 Difference]: Finished difference Result 1535 states and 1774 transitions. [2021-11-09 08:42:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:42:13,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 08:42:13,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:13,301 INFO L225 Difference]: With dead ends: 1535 [2021-11-09 08:42:13,301 INFO L226 Difference]: Without dead ends: 1532 [2021-11-09 08:42:13,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=300, Invalid=1680, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:42:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-11-09 08:42:13,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 921. [2021-11-09 08:42:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 919 states have (on average 1.1501632208922743) internal successors, (1057), 920 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1057 transitions. [2021-11-09 08:42:13,986 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1057 transitions. Word has length 80 [2021-11-09 08:42:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:13,987 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1057 transitions. [2021-11-09 08:42:13,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1057 transitions. [2021-11-09 08:42:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 08:42:13,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:13,988 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:14,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-09 08:42:14,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-09 08:42:14,191 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:42:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 623066000, now seen corresponding path program 1 times [2021-11-09 08:42:14,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:14,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155247713] [2021-11-09 08:42:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:14,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:14,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:42:14,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771905975] [2021-11-09 08:42:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:14,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:14,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:14,256 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:14,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 08:42:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:17,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:42:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 41 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:18,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:18,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155247713] [2021-11-09 08:42:18,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:42:18,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771905975] [2021-11-09 08:42:18,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771905975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:18,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:42:18,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 08:42:18,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361616161] [2021-11-09 08:42:18,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:42:18,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:42:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:42:18,286 INFO L87 Difference]: Start difference. First operand 921 states and 1057 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:19,387 INFO L93 Difference]: Finished difference Result 1212 states and 1421 transitions. [2021-11-09 08:42:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:42:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 08:42:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:19,389 INFO L225 Difference]: With dead ends: 1212 [2021-11-09 08:42:19,390 INFO L226 Difference]: Without dead ends: 960 [2021-11-09 08:42:19,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:42:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-11-09 08:42:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 950. [2021-11-09 08:42:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 948 states have (on average 1.1455696202531647) internal successors, (1086), 949 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1086 transitions. [2021-11-09 08:42:20,038 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1086 transitions. Word has length 81 [2021-11-09 08:42:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:20,038 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1086 transitions. [2021-11-09 08:42:20,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1086 transitions. [2021-11-09 08:42:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 08:42:20,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:20,040 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:20,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-09 08:42:20,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:20,241 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:42:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2120234419, now seen corresponding path program 1 times [2021-11-09 08:42:20,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:20,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049009063] [2021-11-09 08:42:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:20,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:20,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:42:20,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95466258] [2021-11-09 08:42:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:20,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:20,292 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:20,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 08:42:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:23,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:42:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 43 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:24,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:24,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049009063] [2021-11-09 08:42:24,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:42:24,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95466258] [2021-11-09 08:42:24,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95466258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:24,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:42:24,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-09 08:42:24,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736854313] [2021-11-09 08:42:24,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:42:24,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:42:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:42:24,462 INFO L87 Difference]: Start difference. First operand 950 states and 1086 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:25,667 INFO L93 Difference]: Finished difference Result 1332 states and 1559 transitions. [2021-11-09 08:42:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:42:25,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 08:42:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:25,673 INFO L225 Difference]: With dead ends: 1332 [2021-11-09 08:42:25,673 INFO L226 Difference]: Without dead ends: 1080 [2021-11-09 08:42:25,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=480, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:42:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-09 08:42:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1044. [2021-11-09 08:42:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1042 states have (on average 1.145873320537428) internal successors, (1194), 1043 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1194 transitions. [2021-11-09 08:42:26,499 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1194 transitions. Word has length 85 [2021-11-09 08:42:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:26,499 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1194 transitions. [2021-11-09 08:42:26,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1194 transitions. [2021-11-09 08:42:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 08:42:26,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:26,501 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:26,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:26,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-09 08:42:26,701 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:42:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1492528213, now seen corresponding path program 1 times [2021-11-09 08:42:26,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:26,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237326023] [2021-11-09 08:42:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:26,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:26,782 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:42:26,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488935739] [2021-11-09 08:42:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:26,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:26,784 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:26,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 08:42:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:30,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:42:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 44 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:31,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:31,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237326023] [2021-11-09 08:42:31,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:42:31,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488935739] [2021-11-09 08:42:31,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488935739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:31,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:42:31,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-09 08:42:31,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312635205] [2021-11-09 08:42:31,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:42:31,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:31,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:42:31,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:42:31,006 INFO L87 Difference]: Start difference. First operand 1044 states and 1194 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:32,304 INFO L93 Difference]: Finished difference Result 1337 states and 1559 transitions. [2021-11-09 08:42:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:42:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 08:42:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:32,308 INFO L225 Difference]: With dead ends: 1337 [2021-11-09 08:42:32,308 INFO L226 Difference]: Without dead ends: 1085 [2021-11-09 08:42:32,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:42:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-11-09 08:42:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1073. [2021-11-09 08:42:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1071 states have (on average 1.141923436041083) internal successors, (1223), 1072 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1223 transitions. [2021-11-09 08:42:33,228 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1223 transitions. Word has length 85 [2021-11-09 08:42:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:33,228 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1223 transitions. [2021-11-09 08:42:33,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1223 transitions. [2021-11-09 08:42:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 08:42:33,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:33,230 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:33,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-09 08:42:33,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-09 08:42:33,434 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:42:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash 197883735, now seen corresponding path program 3 times [2021-11-09 08:42:33,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:33,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564463757] [2021-11-09 08:42:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:33,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:33,469 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:42:33,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869243955] [2021-11-09 08:42:33,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:42:33,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:33,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:33,471 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:33,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 08:42:36,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:42:36,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:36,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:42:36,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 66 proven. 31 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 08:42:37,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:37,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564463757] [2021-11-09 08:42:37,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:42:37,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869243955] [2021-11-09 08:42:37,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869243955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:37,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:42:37,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:42:37,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953960382] [2021-11-09 08:42:37,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:42:37,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:42:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:42:37,528 INFO L87 Difference]: Start difference. First operand 1073 states and 1223 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:38,917 INFO L93 Difference]: Finished difference Result 1538 states and 1776 transitions. [2021-11-09 08:42:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:42:38,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 08:42:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:38,919 INFO L225 Difference]: With dead ends: 1538 [2021-11-09 08:42:38,919 INFO L226 Difference]: Without dead ends: 1536 [2021-11-09 08:42:38,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:42:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-11-09 08:42:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1095. [2021-11-09 08:42:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1093 states have (on average 1.1473010064043916) internal successors, (1254), 1094 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1254 transitions. [2021-11-09 08:42:39,596 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1254 transitions. Word has length 85 [2021-11-09 08:42:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:39,596 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1254 transitions. [2021-11-09 08:42:39,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1254 transitions. [2021-11-09 08:42:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 08:42:39,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:39,598 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:39,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-09 08:42:39,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:39,798 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:42:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash -344547273, now seen corresponding path program 2 times [2021-11-09 08:42:39,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:39,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983717191] [2021-11-09 08:42:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:39,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:39,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:42:39,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68093562] [2021-11-09 08:42:39,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:42:39,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:39,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:39,827 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:39,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 08:42:42,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:42:42,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:42,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 08:42:43,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:51,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:51,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983717191] [2021-11-09 08:42:51,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:42:51,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68093562] [2021-11-09 08:42:51,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68093562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:51,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:42:51,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 08:42:51,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830131897] [2021-11-09 08:42:51,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:42:51,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:42:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:42:51,453 INFO L87 Difference]: Start difference. First operand 1095 states and 1254 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:59,324 INFO L93 Difference]: Finished difference Result 1650 states and 1900 transitions. [2021-11-09 08:42:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:42:59,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-11-09 08:42:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:59,327 INFO L225 Difference]: With dead ends: 1650 [2021-11-09 08:42:59,327 INFO L226 Difference]: Without dead ends: 1648 [2021-11-09 08:42:59,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:42:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-11-09 08:43:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1264. [2021-11-09 08:43:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1262 states have (on average 1.1497622820919176) internal successors, (1451), 1263 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1451 transitions. [2021-11-09 08:43:00,431 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1451 transitions. Word has length 88 [2021-11-09 08:43:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:00,431 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1451 transitions. [2021-11-09 08:43:00,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1451 transitions. [2021-11-09 08:43:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 08:43:00,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:00,433 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:00,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:00,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:00,634 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:43:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash 358499890, now seen corresponding path program 4 times [2021-11-09 08:43:00,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:00,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587140628] [2021-11-09 08:43:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:00,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:00,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:43:00,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857286784] [2021-11-09 08:43:00,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:43:00,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:00,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:00,669 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:00,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-09 08:43:04,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:43:04,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:04,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:43:04,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 122 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-09 08:43:04,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:04,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587140628] [2021-11-09 08:43:04,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:43:04,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857286784] [2021-11-09 08:43:04,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857286784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:04,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:04,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:43:04,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572807205] [2021-11-09 08:43:04,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:43:04,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:43:04,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:43:04,852 INFO L87 Difference]: Start difference. First operand 1264 states and 1451 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:06,648 INFO L93 Difference]: Finished difference Result 2026 states and 2385 transitions. [2021-11-09 08:43:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:43:06,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 08:43:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:06,650 INFO L225 Difference]: With dead ends: 2026 [2021-11-09 08:43:06,650 INFO L226 Difference]: Without dead ends: 1598 [2021-11-09 08:43:06,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:43:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-11-09 08:43:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1466. [2021-11-09 08:43:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1464 states have (on average 1.1564207650273224) internal successors, (1693), 1465 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1693 transitions. [2021-11-09 08:43:07,901 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1693 transitions. Word has length 89 [2021-11-09 08:43:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:07,902 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 1693 transitions. [2021-11-09 08:43:07,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1693 transitions. [2021-11-09 08:43:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 08:43:07,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:07,904 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:07,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:08,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-09 08:43:08,104 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:43:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1873374549, now seen corresponding path program 1 times [2021-11-09 08:43:08,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:08,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902337143] [2021-11-09 08:43:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:08,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:08,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:43:08,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123592665] [2021-11-09 08:43:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:08,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:08,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:08,139 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:08,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-09 08:43:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:43:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 64 proven. 123 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:43:12,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:12,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902337143] [2021-11-09 08:43:12,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:43:12,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123592665] [2021-11-09 08:43:12,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123592665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:12,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:12,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 08:43:12,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897610552] [2021-11-09 08:43:12,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:43:12,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:12,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:43:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:43:12,517 INFO L87 Difference]: Start difference. First operand 1466 states and 1693 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:14,540 INFO L93 Difference]: Finished difference Result 2120 states and 2513 transitions. [2021-11-09 08:43:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:43:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 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 91 [2021-11-09 08:43:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:14,543 INFO L225 Difference]: With dead ends: 2120 [2021-11-09 08:43:14,543 INFO L226 Difference]: Without dead ends: 1689 [2021-11-09 08:43:14,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=552, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:43:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-11-09 08:43:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1595. [2021-11-09 08:43:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1593 states have (on average 1.1569365976145638) internal successors, (1843), 1594 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 1843 transitions. [2021-11-09 08:43:15,981 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 1843 transitions. Word has length 91 [2021-11-09 08:43:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:15,982 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 1843 transitions. [2021-11-09 08:43:15,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 1843 transitions. [2021-11-09 08:43:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-09 08:43:15,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:15,984 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:16,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:16,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:16,184 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:43:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1820070976, now seen corresponding path program 2 times [2021-11-09 08:43:16,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:16,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47086580] [2021-11-09 08:43:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:16,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:16,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:43:16,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509272624] [2021-11-09 08:43:16,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:43:16,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:16,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:16,216 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:16,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-09 08:43:19,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:43:19,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:19,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:43:19,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-09 08:43:20,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:20,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47086580] [2021-11-09 08:43:20,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:43:20,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509272624] [2021-11-09 08:43:20,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509272624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:43:20,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:43:20,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:43:20,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989702663] [2021-11-09 08:43:20,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:43:20,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:20,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:43:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:43:20,166 INFO L87 Difference]: Start difference. First operand 1595 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:21,666 INFO L93 Difference]: Finished difference Result 2018 states and 2389 transitions. [2021-11-09 08:43:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:43:21,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 92 [2021-11-09 08:43:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:21,668 INFO L225 Difference]: With dead ends: 2018 [2021-11-09 08:43:21,668 INFO L226 Difference]: Without dead ends: 1581 [2021-11-09 08:43:21,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:43:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-11-09 08:43:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1551. [2021-11-09 08:43:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1549 states have (on average 1.145255003227889) internal successors, (1774), 1550 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1774 transitions. [2021-11-09 08:43:23,091 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1774 transitions. Word has length 92 [2021-11-09 08:43:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:23,092 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 1774 transitions. [2021-11-09 08:43:23,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1774 transitions. [2021-11-09 08:43:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:43:23,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:23,094 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:23,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-09 08:43:23,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:23,295 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:43:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash -134695124, now seen corresponding path program 3 times [2021-11-09 08:43:23,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:23,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012176498] [2021-11-09 08:43:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:23,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:23,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:43:23,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919826945] [2021-11-09 08:43:23,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:43:23,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:23,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:23,325 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:23,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-09 08:43:27,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:43:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:27,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:43:27,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-09 08:43:28,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:28,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012176498] [2021-11-09 08:43:28,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:43:28,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919826945] [2021-11-09 08:43:28,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919826945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:28,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:28,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:43:28,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333300090] [2021-11-09 08:43:28,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:43:28,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:28,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:43:28,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:43:28,931 INFO L87 Difference]: Start difference. First operand 1551 states and 1774 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:31,143 INFO L93 Difference]: Finished difference Result 2030 states and 2311 transitions. [2021-11-09 08:43:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:43:31,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 08:43:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:31,146 INFO L225 Difference]: With dead ends: 2030 [2021-11-09 08:43:31,146 INFO L226 Difference]: Without dead ends: 2028 [2021-11-09 08:43:31,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:43:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-11-09 08:43:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1659. [2021-11-09 08:43:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1657 states have (on average 1.1424260712130356) internal successors, (1893), 1658 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 1893 transitions. [2021-11-09 08:43:32,650 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 1893 transitions. Word has length 98 [2021-11-09 08:43:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:32,651 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 1893 transitions. [2021-11-09 08:43:32,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 1893 transitions. [2021-11-09 08:43:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 08:43:32,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:32,653 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:32,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-09 08:43:32,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-09 08:43:32,853 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:43:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash -382278046, now seen corresponding path program 1 times [2021-11-09 08:43:32,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:32,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63735550] [2021-11-09 08:43:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:32,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:32,906 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:43:32,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015732968] [2021-11-09 08:43:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:32,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:32,921 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:32,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-09 08:43:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:36,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:43:36,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 81 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:43:37,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:37,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63735550] [2021-11-09 08:43:37,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:43:37,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015732968] [2021-11-09 08:43:37,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015732968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:37,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:37,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 08:43:37,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9741560] [2021-11-09 08:43:37,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:43:37,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:43:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:43:37,299 INFO L87 Difference]: Start difference. First operand 1659 states and 1893 transitions. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:40,132 INFO L93 Difference]: Finished difference Result 2706 states and 3152 transitions. [2021-11-09 08:43:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:43:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 99 [2021-11-09 08:43:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:40,135 INFO L225 Difference]: With dead ends: 2706 [2021-11-09 08:43:40,135 INFO L226 Difference]: Without dead ends: 2249 [2021-11-09 08:43:40,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=711, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:43:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-11-09 08:43:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2109. [2021-11-09 08:43:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2107 states have (on average 1.136687233032748) internal successors, (2395), 2108 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 2395 transitions. [2021-11-09 08:43:42,250 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 2395 transitions. Word has length 99 [2021-11-09 08:43:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:42,250 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 2395 transitions. [2021-11-09 08:43:42,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 2395 transitions. [2021-11-09 08:43:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-09 08:43:42,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:42,255 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:42,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:42,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:42,469 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:43:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -65387231, now seen corresponding path program 5 times [2021-11-09 08:43:42,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:42,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814682186] [2021-11-09 08:43:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:42,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:42,505 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:43:42,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66855186] [2021-11-09 08:43:42,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:43:42,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:42,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:42,507 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:42,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-09 08:43:46,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 08:43:46,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 08:43:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 9 proven. 269 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:43:56,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:56,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814682186] [2021-11-09 08:43:56,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:43:56,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66855186] [2021-11-09 08:43:56,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66855186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:56,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:56,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 08:43:56,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648067657] [2021-11-09 08:43:56,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:43:56,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:56,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:43:56,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:43:56,881 INFO L87 Difference]: Start difference. First operand 2109 states and 2395 transitions. Second operand has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:05,683 INFO L93 Difference]: Finished difference Result 3253 states and 3731 transitions. [2021-11-09 08:44:05,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:44:05,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-09 08:44:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:05,686 INFO L225 Difference]: With dead ends: 3253 [2021-11-09 08:44:05,686 INFO L226 Difference]: Without dead ends: 2481 [2021-11-09 08:44:05,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:44:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-09 08:44:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1639. [2021-11-09 08:44:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.1184371184371185) internal successors, (1832), 1638 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 1832 transitions. [2021-11-09 08:44:07,386 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 1832 transitions. Word has length 105 [2021-11-09 08:44:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:07,386 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 1832 transitions. [2021-11-09 08:44:07,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 1832 transitions. [2021-11-09 08:44:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 08:44:07,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:07,389 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:07,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:07,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:07,590 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:44:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1356240361, now seen corresponding path program 1 times [2021-11-09 08:44:07,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:07,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359071642] [2021-11-09 08:44:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:07,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:07,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:44:07,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929001050] [2021-11-09 08:44:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:07,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:07,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:07,633 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:07,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-09 08:44:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 08:44:12,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 84 proven. 191 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:44:12,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:12,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359071642] [2021-11-09 08:44:12,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:44:12,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929001050] [2021-11-09 08:44:12,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929001050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:12,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:44:12,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 08:44:12,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580724520] [2021-11-09 08:44:12,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:44:12,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:44:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:44:12,762 INFO L87 Difference]: Start difference. First operand 1639 states and 1832 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:15,363 INFO L93 Difference]: Finished difference Result 2212 states and 2504 transitions. [2021-11-09 08:44:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:44:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-09 08:44:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:15,366 INFO L225 Difference]: With dead ends: 2212 [2021-11-09 08:44:15,366 INFO L226 Difference]: Without dead ends: 1895 [2021-11-09 08:44:15,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=462, Invalid=798, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:44:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-11-09 08:44:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1796. [2021-11-09 08:44:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 1.1158774373259053) internal successors, (2003), 1795 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2003 transitions. [2021-11-09 08:44:17,442 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2003 transitions. Word has length 109 [2021-11-09 08:44:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:17,442 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 2003 transitions. [2021-11-09 08:44:17,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2003 transitions. [2021-11-09 08:44:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-09 08:44:17,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:17,445 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:17,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:17,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-09 08:44:17,646 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:44:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1415032110, now seen corresponding path program 2 times [2021-11-09 08:44:17,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:17,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661501438] [2021-11-09 08:44:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:17,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:17,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:44:17,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467694505] [2021-11-09 08:44:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:44:17,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:17,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:17,752 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:17,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-09 08:44:21,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:44:21,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:44:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 91 proven. 218 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:44:22,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:22,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661501438] [2021-11-09 08:44:22,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:44:22,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467694505] [2021-11-09 08:44:22,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467694505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:22,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:44:22,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 08:44:22,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733288880] [2021-11-09 08:44:22,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:44:22,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:44:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:44:22,710 INFO L87 Difference]: Start difference. First operand 1796 states and 2003 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:25,800 INFO L93 Difference]: Finished difference Result 2369 states and 2675 transitions. [2021-11-09 08:44:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:44:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-09 08:44:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:25,803 INFO L225 Difference]: With dead ends: 2369 [2021-11-09 08:44:25,803 INFO L226 Difference]: Without dead ends: 2052 [2021-11-09 08:44:25,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=516, Invalid=890, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:44:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-11-09 08:44:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1953. [2021-11-09 08:44:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 1.1137295081967213) internal successors, (2174), 1952 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2174 transitions. [2021-11-09 08:44:27,800 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2174 transitions. Word has length 113 [2021-11-09 08:44:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:27,801 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 2174 transitions. [2021-11-09 08:44:27,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2174 transitions. [2021-11-09 08:44:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-09 08:44:27,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:27,804 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:27,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:28,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:28,004 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-09 08:44:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash -114000835, now seen corresponding path program 3 times [2021-11-09 08:44:28,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:28,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690979747] [2021-11-09 08:44:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:28,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:28,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:44:28,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648347217] [2021-11-09 08:44:28,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:44:28,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:28,041 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:28,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-09 08:44:32,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:44:32,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:32,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:44:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-09 08:44:32,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:32,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690979747] [2021-11-09 08:44:32,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:44:32,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648347217] [2021-11-09 08:44:32,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648347217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:44:32,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:44:32,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:44:32,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646791050] [2021-11-09 08:44:32,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:44:32,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:44:32,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:44:32,364 INFO L87 Difference]: Start difference. First operand 1953 states and 2174 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:34,745 INFO L93 Difference]: Finished difference Result 2180 states and 2439 transitions. [2021-11-09 08:44:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:44:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 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 120 [2021-11-09 08:44:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:34,746 INFO L225 Difference]: With dead ends: 2180 [2021-11-09 08:44:34,746 INFO L226 Difference]: Without dead ends: 0 [2021-11-09 08:44:34,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:44:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-09 08:44:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-09 08:44:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-09 08:44:34,750 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 120 [2021-11-09 08:44:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:34,751 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 08:44:34,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-09 08:44:34,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-09 08:44:34,754 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:44:34,755 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:44:34,755 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:44:34,755 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:44:34,756 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:44:34,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:34,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d65f3191-9bec-40e8-896a-f55b5c976547/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:34,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-09 08:44:34,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 08:44:34,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 08:45:43,721 WARN L207 SmtUtils]: Spent 1.15 m on a formula simplification. DAG size of input: 2410 DAG size of output: 1986 [2021-11-09 08:45:43,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 08:46:16,932 WARN L207 SmtUtils]: Spent 33.19 s on a formula simplification. DAG size of input: 1766 DAG size of output: 1456 [2021-11-09 08:46:16,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 08:46:50,821 WARN L207 SmtUtils]: Spent 33.87 s on a formula simplification. DAG size of input: 1762 DAG size of output: 1451 [2021-11-09 08:46:50,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms