./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be --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 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:13:38,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:13:38,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:13:38,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:13:38,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:13:38,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:13:38,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:13:38,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:13:38,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:13:38,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:13:38,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:13:38,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:13:38,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:13:38,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:13:38,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:13:38,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:13:38,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:13:38,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:13:38,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:13:38,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:13:38,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:13:38,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:13:38,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:13:38,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:13:38,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:13:38,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:13:38,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:13:38,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:13:38,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:13:38,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:13:38,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:13:38,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:13:38,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:13:38,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:13:38,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:13:38,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:13:38,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:13:38,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:13:38,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:13:38,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:13:38,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:13:38,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:13:38,670 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:13:38,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:13:38,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:13:38,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:13:38,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:13:38,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:13:38,676 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:13:38,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:13:38,677 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:13:38,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:13:38,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:13:38,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:13:38,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:13:38,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:13:38,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:13:38,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:13:38,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:13:38,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:13:38,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:13:38,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:13:38,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:13:38,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:13:38,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:13:38,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:13:38,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:13:38,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:13:38,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:13:38,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:13:38,685 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:13:38,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:13:38,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:13:38,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:13:38,688 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_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 [2021-10-21 20:13:39,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:13:39,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:13:39,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:13:39,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:13:39,081 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:13:39,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2021-10-21 20:13:39,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/data/2e4216685/0933ea2baf454218b64c104e61363884/FLAG833114d29 [2021-10-21 20:13:39,728 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:13:39,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2021-10-21 20:13:39,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/data/2e4216685/0933ea2baf454218b64c104e61363884/FLAG833114d29 [2021-10-21 20:13:40,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/data/2e4216685/0933ea2baf454218b64c104e61363884 [2021-10-21 20:13:40,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:13:40,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:13:40,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:13:40,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:13:40,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:13:40,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b47a294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40, skipping insertion in model container [2021-10-21 20:13:40,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:13:40,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:13:40,385 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_5801e30a-5900-4185-abae-f237bcf0c244/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2021-10-21 20:13:40,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:13:40,423 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:13:40,435 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_5801e30a-5900-4185-abae-f237bcf0c244/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2021-10-21 20:13:40,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:13:40,463 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:13:40,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40 WrapperNode [2021-10-21 20:13:40,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:13:40,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:13:40,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:13:40,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:13:40,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:13:40,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:13:40,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:13:40,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:13:40,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:13:40,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:13:40,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:13:40,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:13:40,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (1/1) ... [2021-10-21 20:13:40,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:13:40,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:40,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:13:40,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:13:40,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:13:40,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:13:40,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:13:40,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:13:40,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:13:40,983 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-21 20:13:40,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:13:40 BoogieIcfgContainer [2021-10-21 20:13:40,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:13:40,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:13:40,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:13:41,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:13:41,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:13:40" (1/3) ... [2021-10-21 20:13:41,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dce3784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:13:41, skipping insertion in model container [2021-10-21 20:13:41,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:13:40" (2/3) ... [2021-10-21 20:13:41,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dce3784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:13:41, skipping insertion in model container [2021-10-21 20:13:41,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:13:40" (3/3) ... [2021-10-21 20:13:41,021 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound20.c [2021-10-21 20:13:41,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:13:41,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-21 20:13:41,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:13:41,133 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 [2021-10-21 20:13:41,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-21 20:13:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 1.606060606060606) internal successors, (53), 40 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) [2021-10-21 20:13:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:13:41,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:41,159 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:41,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:41,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1236199694, now seen corresponding path program 1 times [2021-10-21 20:13:41,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:41,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42464717] [2021-10-21 20:13:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:41,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:41,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:41,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42464717] [2021-10-21 20:13:41,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42464717] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:41,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:41,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 20:13:41,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426609307] [2021-10-21 20:13:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 20:13:41,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 20:13:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:13:41,476 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 1.606060606060606) internal successors, (53), 40 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) 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) [2021-10-21 20:13:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:41,515 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-10-21 20:13:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:13:41,517 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 [2021-10-21 20:13:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:41,528 INFO L225 Difference]: With dead ends: 79 [2021-10-21 20:13:41,528 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 20:13:41,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:13:41,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 20:13:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-21 20:13:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3) internal successors, (39), 36 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) [2021-10-21 20:13:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-10-21 20:13:41,584 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 10 [2021-10-21 20:13:41,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:41,587 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-10-21 20:13:41,587 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) [2021-10-21 20:13:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-10-21 20:13:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:13:41,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:41,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:41,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:13:41,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:41,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-21 20:13:41,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:41,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310753627] [2021-10-21 20:13:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:41,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:41,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:41,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864795576] [2021-10-21 20:13:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:41,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:41,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:41,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:13:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:13:41,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:42,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:42,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310753627] [2021-10-21 20:13:42,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:42,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864795576] [2021-10-21 20:13:42,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864795576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:42,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:42,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:13:42,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603394915] [2021-10-21 20:13:42,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:13:42,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:13:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:13:42,072 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-10-21 20:13:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:42,216 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-10-21 20:13:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:13:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2021-10-21 20:13:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:42,223 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:13:42,223 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 20:13:42,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:13:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 20:13:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-10-21 20:13:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 51 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) [2021-10-21 20:13:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-10-21 20:13:42,252 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 10 [2021-10-21 20:13:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:42,253 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-10-21 20:13:42,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-10-21 20:13:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-10-21 20:13:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:13:42,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:42,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:42,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:42,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:42,483 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1507402239, now seen corresponding path program 1 times [2021-10-21 20:13:42,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:42,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920341237] [2021-10-21 20:13:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:42,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:42,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:42,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920341237] [2021-10-21 20:13:42,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920341237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:42,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:42,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:13:42,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127304232] [2021-10-21 20:13:42,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:13:42,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:13:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:13:42,611 INFO L87 Difference]: Start difference. First operand 52 states and 61 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) [2021-10-21 20:13:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:42,648 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-10-21 20:13:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:13:42,649 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 [2021-10-21 20:13:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:42,652 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:13:42,653 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 20:13:42,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:13:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 20:13:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-21 20:13:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-10-21 20:13:42,674 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 11 [2021-10-21 20:13:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:42,674 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-10-21 20:13:42,675 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) [2021-10-21 20:13:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-10-21 20:13:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:13:42,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:42,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:42,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:13:42,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:42,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:42,678 INFO L82 PathProgramCache]: Analyzing trace with hash 515817425, now seen corresponding path program 1 times [2021-10-21 20:13:42,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:42,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550227929] [2021-10-21 20:13:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:42,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:42,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:42,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975921534] [2021-10-21 20:13:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:42,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:42,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:42,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:42,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:13:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:42,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:13:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:43,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:43,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550227929] [2021-10-21 20:13:43,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:43,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975921534] [2021-10-21 20:13:43,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975921534] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:43,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:43,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:13:43,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433476403] [2021-10-21 20:13:43,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:13:43,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:13:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:13:43,168 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-10-21 20:13:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:43,511 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-10-21 20:13:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:13:43,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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 [2021-10-21 20:13:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:43,513 INFO L225 Difference]: With dead ends: 66 [2021-10-21 20:13:43,513 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 20:13:43,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:13:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 20:13:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-10-21 20:13:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-10-21 20:13:43,539 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 12 [2021-10-21 20:13:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:43,540 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-10-21 20:13:43,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-10-21 20:13:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-10-21 20:13:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:13:43,542 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:43,542 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:43,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-21 20:13:43,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:43,758 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1779462740, now seen corresponding path program 1 times [2021-10-21 20:13:43,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:43,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043795491] [2021-10-21 20:13:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:43,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:43,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:43,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273087264] [2021-10-21 20:13:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:43,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:43,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:43,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:43,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:13:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:43,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 20:13:43,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:44,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:44,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043795491] [2021-10-21 20:13:44,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:44,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273087264] [2021-10-21 20:13:44,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273087264] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:44,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:44,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:13:44,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880480256] [2021-10-21 20:13:44,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:13:44,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:13:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:44,175 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:44,334 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-10-21 20:13:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:13:44,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-10-21 20:13:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:44,346 INFO L225 Difference]: With dead ends: 104 [2021-10-21 20:13:44,346 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 20:13:44,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 20:13:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2021-10-21 20:13:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 73 states have (on average 1.3424657534246576) internal successors, (98), 79 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-10-21 20:13:44,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 14 [2021-10-21 20:13:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:44,381 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-10-21 20:13:44,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-10-21 20:13:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:13:44,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:44,382 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:44,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:44,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:44,598 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:44,599 INFO L82 PathProgramCache]: Analyzing trace with hash -801918668, now seen corresponding path program 1 times [2021-10-21 20:13:44,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:44,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716380569] [2021-10-21 20:13:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:44,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:44,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:44,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456387515] [2021-10-21 20:13:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:44,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:44,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:44,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:13:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:44,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:13:44,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:44,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:44,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716380569] [2021-10-21 20:13:44,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:44,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456387515] [2021-10-21 20:13:44,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456387515] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:44,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:44,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:13:44,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731320166] [2021-10-21 20:13:44,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:13:44,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:13:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:13:44,802 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.25) 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) [2021-10-21 20:13:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:44,887 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2021-10-21 20:13:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:13:44,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) 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 [2021-10-21 20:13:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:44,891 INFO L225 Difference]: With dead ends: 108 [2021-10-21 20:13:44,891 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 20:13:44,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:13:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 20:13:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-10-21 20:13:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 85 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) [2021-10-21 20:13:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2021-10-21 20:13:44,918 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 17 [2021-10-21 20:13:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:44,919 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2021-10-21 20:13:44,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) 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) [2021-10-21 20:13:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2021-10-21 20:13:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:13:44,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:44,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:44,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:45,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 20:13:45,142 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1844536457, now seen corresponding path program 1 times [2021-10-21 20:13:45,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:45,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613322121] [2021-10-21 20:13:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:45,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:45,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:45,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559689417] [2021-10-21 20:13:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:45,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:45,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:45,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:45,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:13:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:13:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:45,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:45,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613322121] [2021-10-21 20:13:45,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:45,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559689417] [2021-10-21 20:13:45,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559689417] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:13:45,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:13:45,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:13:45,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367934811] [2021-10-21 20:13:45,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:13:45,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:45,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:13:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:45,503 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-10-21 20:13:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:45,711 INFO L93 Difference]: Finished difference Result 131 states and 149 transitions. [2021-10-21 20:13:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:13:45,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 [2021-10-21 20:13:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:45,713 INFO L225 Difference]: With dead ends: 131 [2021-10-21 20:13:45,713 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 20:13:45,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 20:13:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2021-10-21 20:13:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 92 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) [2021-10-21 20:13:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2021-10-21 20:13:45,728 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 19 [2021-10-21 20:13:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:45,728 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2021-10-21 20:13:45,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-10-21 20:13:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2021-10-21 20:13:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:13:45,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:45,729 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:45,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:45,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:45,946 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1795587856, now seen corresponding path program 1 times [2021-10-21 20:13:45,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:45,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3447559] [2021-10-21 20:13:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:45,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:45,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:45,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847502936] [2021-10-21 20:13:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:45,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:45,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:45,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:45,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:13:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:46,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:13:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:13:46,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:46,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3447559] [2021-10-21 20:13:46,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:46,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847502936] [2021-10-21 20:13:46,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847502936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:46,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:46,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 20:13:46,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170496397] [2021-10-21 20:13:46,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:13:46,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:46,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:13:46,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:13:46,273 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-21 20:13:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:46,349 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-10-21 20:13:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:13:46,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 19 [2021-10-21 20:13:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:46,351 INFO L225 Difference]: With dead ends: 103 [2021-10-21 20:13:46,351 INFO L226 Difference]: Without dead ends: 93 [2021-10-21 20:13:46,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:13:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-21 20:13:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2021-10-21 20:13:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 80 states have (on average 1.275) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-10-21 20:13:46,363 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 19 [2021-10-21 20:13:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:46,363 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-10-21 20:13:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-21 20:13:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-10-21 20:13:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:13:46,364 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:46,365 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:46,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:46,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 20:13:46,582 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash 171335487, now seen corresponding path program 1 times [2021-10-21 20:13:46,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:46,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125517953] [2021-10-21 20:13:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:46,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:46,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:46,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217393760] [2021-10-21 20:13:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:46,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:46,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:46,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:46,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:13:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:46,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:13:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:46,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:46,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125517953] [2021-10-21 20:13:46,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:46,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217393760] [2021-10-21 20:13:46,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217393760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:46,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:46,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 20:13:46,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809295612] [2021-10-21 20:13:46,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:13:46,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:13:46,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:13:46,874 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2021-10-21 20:13:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:46,906 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-10-21 20:13:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:13:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 [2021-10-21 20:13:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:46,908 INFO L225 Difference]: With dead ends: 109 [2021-10-21 20:13:46,908 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 20:13:46,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 20:13:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-10-21 20:13:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-10-21 20:13:46,924 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 20 [2021-10-21 20:13:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:46,925 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-10-21 20:13:46,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2021-10-21 20:13:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-10-21 20:13:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:13:46,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:46,928 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:47,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:47,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-21 20:13:47,154 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1017079379, now seen corresponding path program 1 times [2021-10-21 20:13:47,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:47,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543963353] [2021-10-21 20:13:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:47,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:47,169 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:47,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011668467] [2021-10-21 20:13:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:47,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:47,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:47,171 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:47,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:13:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:47,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 20:13:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:47,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543963353] [2021-10-21 20:13:47,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:47,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011668467] [2021-10-21 20:13:47,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011668467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:47,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 20:13:47,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864113986] [2021-10-21 20:13:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:13:47,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:13:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:13:47,860 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:48,205 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2021-10-21 20:13:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:13:48,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-21 20:13:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:48,211 INFO L225 Difference]: With dead ends: 133 [2021-10-21 20:13:48,211 INFO L226 Difference]: Without dead ends: 131 [2021-10-21 20:13:48,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:13:48,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-21 20:13:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-10-21 20:13:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 93 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2021-10-21 20:13:48,222 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 21 [2021-10-21 20:13:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:48,222 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2021-10-21 20:13:48,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2021-10-21 20:13:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:13:48,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:48,224 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:48,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:48,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:48,450 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1159045544, now seen corresponding path program 1 times [2021-10-21 20:13:48,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:48,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542157064] [2021-10-21 20:13:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:48,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:48,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:48,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515290548] [2021-10-21 20:13:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:48,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:48,466 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:48,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:13:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:48,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 20:13:48,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:49,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:49,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542157064] [2021-10-21 20:13:49,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:49,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515290548] [2021-10-21 20:13:49,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515290548] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:49,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:49,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:13:49,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528019471] [2021-10-21 20:13:49,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:13:49,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:49,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:13:49,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:49,382 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-10-21 20:13:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:49,961 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2021-10-21 20:13:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 20:13:49,962 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 [2021-10-21 20:13:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:49,964 INFO L225 Difference]: With dead ends: 150 [2021-10-21 20:13:49,964 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 20:13:49,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:13:49,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 20:13:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-10-21 20:13:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.2654867256637168) internal successors, (143), 119 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2021-10-21 20:13:49,981 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 23 [2021-10-21 20:13:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:49,982 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2021-10-21 20:13:49,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-10-21 20:13:49,982 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2021-10-21 20:13:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:13:49,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:49,985 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:50,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:50,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:50,202 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:50,203 INFO L82 PathProgramCache]: Analyzing trace with hash -559475920, now seen corresponding path program 1 times [2021-10-21 20:13:50,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:50,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950221230] [2021-10-21 20:13:50,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:50,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:50,219 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:50,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969821641] [2021-10-21 20:13:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:50,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:50,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:50,221 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:50,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 20:13:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:13:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:50,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:50,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950221230] [2021-10-21 20:13:50,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:50,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969821641] [2021-10-21 20:13:50,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969821641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:50,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:50,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:13:50,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038370154] [2021-10-21 20:13:50,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:13:50,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:50,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:13:50,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:50,851 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:51,018 INFO L93 Difference]: Finished difference Result 157 states and 183 transitions. [2021-10-21 20:13:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:13:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 20:13:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:51,021 INFO L225 Difference]: With dead ends: 157 [2021-10-21 20:13:51,021 INFO L226 Difference]: Without dead ends: 153 [2021-10-21 20:13:51,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:51,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-21 20:13:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2021-10-21 20:13:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 125 states have (on average 1.272) internal successors, (159), 131 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2021-10-21 20:13:51,039 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 28 [2021-10-21 20:13:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:51,039 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2021-10-21 20:13:51,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2021-10-21 20:13:51,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:13:51,041 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:51,041 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:51,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:51,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:51,258 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1572440212, now seen corresponding path program 2 times [2021-10-21 20:13:51,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:51,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996667689] [2021-10-21 20:13:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:51,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:51,289 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:51,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117751354] [2021-10-21 20:13:51,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:13:51,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:51,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:51,293 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:51,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 20:13:51,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:13:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:13:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:13:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:51,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:51,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996667689] [2021-10-21 20:13:51,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:51,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117751354] [2021-10-21 20:13:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117751354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:51,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:51,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:13:51,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188031859] [2021-10-21 20:13:51,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:13:51,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:13:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:51,975 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:52,161 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2021-10-21 20:13:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:13:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 20:13:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:52,164 INFO L225 Difference]: With dead ends: 161 [2021-10-21 20:13:52,164 INFO L226 Difference]: Without dead ends: 151 [2021-10-21 20:13:52,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-21 20:13:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2021-10-21 20:13:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 133 states have (on average 1.2706766917293233) internal successors, (169), 139 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 169 transitions. [2021-10-21 20:13:52,183 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 169 transitions. Word has length 28 [2021-10-21 20:13:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:52,183 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 169 transitions. [2021-10-21 20:13:52,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 169 transitions. [2021-10-21 20:13:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:13:52,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:52,185 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:52,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:52,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:52,406 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash -221158463, now seen corresponding path program 2 times [2021-10-21 20:13:52,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:52,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524585730] [2021-10-21 20:13:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:52,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:52,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:52,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632654755] [2021-10-21 20:13:52,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:13:52,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:52,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:52,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:52,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 20:13:52,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:13:52,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:13:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:13:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:52,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:52,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524585730] [2021-10-21 20:13:52,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:52,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632654755] [2021-10-21 20:13:52,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632654755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:52,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:52,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 20:13:52,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719818512] [2021-10-21 20:13:52,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:13:52,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:52,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:13:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:52,842 INFO L87 Difference]: Start difference. First operand 140 states and 169 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:52,886 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2021-10-21 20:13:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:13:52,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-10-21 20:13:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:52,888 INFO L225 Difference]: With dead ends: 162 [2021-10-21 20:13:52,888 INFO L226 Difference]: Without dead ends: 144 [2021-10-21 20:13:52,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:13:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-21 20:13:52,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-21 20:13:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 143 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2021-10-21 20:13:52,908 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 29 [2021-10-21 20:13:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:52,909 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2021-10-21 20:13:52,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2021-10-21 20:13:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:13:52,910 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:52,910 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:52,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:53,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 20:13:53,122 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:53,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1734668817, now seen corresponding path program 2 times [2021-10-21 20:13:53,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:53,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492574621] [2021-10-21 20:13:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:53,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:53,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:53,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597893132] [2021-10-21 20:13:53,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:13:53,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:53,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:53,149 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:53,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:13:53,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:13:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:13:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 20:13:53,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:54,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:54,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492574621] [2021-10-21 20:13:54,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:54,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597893132] [2021-10-21 20:13:54,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597893132] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:54,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:54,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:13:54,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234548369] [2021-10-21 20:13:54,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:13:54,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:13:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:13:54,176 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) 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) [2021-10-21 20:13:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:54,470 INFO L93 Difference]: Finished difference Result 186 states and 216 transitions. [2021-10-21 20:13:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:13:54,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) 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 [2021-10-21 20:13:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:54,472 INFO L225 Difference]: With dead ends: 186 [2021-10-21 20:13:54,472 INFO L226 Difference]: Without dead ends: 184 [2021-10-21 20:13:54,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:13:54,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-21 20:13:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2021-10-21 20:13:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 146 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2021-10-21 20:13:54,495 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 30 [2021-10-21 20:13:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:54,497 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2021-10-21 20:13:54,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) 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) [2021-10-21 20:13:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2021-10-21 20:13:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:13:54,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:54,499 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:54,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:54,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 20:13:54,710 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 713600463, now seen corresponding path program 1 times [2021-10-21 20:13:54,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:54,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56471757] [2021-10-21 20:13:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:54,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:54,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:54,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460013295] [2021-10-21 20:13:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:54,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:54,729 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:54,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:13:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-21 20:13:55,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:56,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:56,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56471757] [2021-10-21 20:13:56,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:56,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460013295] [2021-10-21 20:13:56,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460013295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:56,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:56,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:13:56,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968455744] [2021-10-21 20:13:56,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:13:56,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:56,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:13:56,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:56,208 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-10-21 20:13:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:56,592 INFO L93 Difference]: Finished difference Result 183 states and 212 transitions. [2021-10-21 20:13:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:13:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2021-10-21 20:13:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:56,594 INFO L225 Difference]: With dead ends: 183 [2021-10-21 20:13:56,594 INFO L226 Difference]: Without dead ends: 181 [2021-10-21 20:13:56,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:13:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-21 20:13:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 147. [2021-10-21 20:13:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 140 states have (on average 1.2357142857142858) internal successors, (173), 146 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2021-10-21 20:13:56,616 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 30 [2021-10-21 20:13:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:56,617 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2021-10-21 20:13:56,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-10-21 20:13:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2021-10-21 20:13:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 20:13:56,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:56,618 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:56,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:56,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 20:13:56,834 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:56,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1249637014, now seen corresponding path program 1 times [2021-10-21 20:13:56,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:56,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827640403] [2021-10-21 20:13:56,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:56,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:56,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:56,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212160573] [2021-10-21 20:13:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:56,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:56,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:56,851 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:56,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:13:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:13:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 20:13:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:58,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:58,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827640403] [2021-10-21 20:13:58,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:58,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212160573] [2021-10-21 20:13:58,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212160573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:58,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:58,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:13:58,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971391280] [2021-10-21 20:13:58,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:13:58,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:13:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:58,076 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-10-21 20:13:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:13:58,380 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2021-10-21 20:13:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:13:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 [2021-10-21 20:13:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:13:58,382 INFO L225 Difference]: With dead ends: 191 [2021-10-21 20:13:58,383 INFO L226 Difference]: Without dead ends: 179 [2021-10-21 20:13:58,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:13:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-21 20:13:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2021-10-21 20:13:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 132 states have (on average 1.2348484848484849) internal successors, (163), 138 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:13:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2021-10-21 20:13:58,402 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 32 [2021-10-21 20:13:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:13:58,403 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2021-10-21 20:13:58,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-10-21 20:13:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2021-10-21 20:13:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 20:13:58,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:13:58,404 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:13:58,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:13:58,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:58,621 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:13:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:13:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -744507692, now seen corresponding path program 2 times [2021-10-21 20:13:58,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:13:58,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095608860] [2021-10-21 20:13:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:13:58,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:13:58,633 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:13:58,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295068064] [2021-10-21 20:13:58,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:13:58,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:13:58,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:13:58,635 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:13:58,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 20:13:59,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:13:59,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:13:59,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 20:13:59,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:13:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:13:59,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:13:59,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095608860] [2021-10-21 20:13:59,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:13:59,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295068064] [2021-10-21 20:13:59,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295068064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:13:59,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:13:59,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:13:59,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402046257] [2021-10-21 20:13:59,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:13:59,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:13:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:13:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:13:59,726 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-10-21 20:14:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:14:00,065 INFO L93 Difference]: Finished difference Result 195 states and 226 transitions. [2021-10-21 20:14:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:14:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 [2021-10-21 20:14:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:14:00,068 INFO L225 Difference]: With dead ends: 195 [2021-10-21 20:14:00,068 INFO L226 Difference]: Without dead ends: 183 [2021-10-21 20:14:00,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:14:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-10-21 20:14:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 146. [2021-10-21 20:14:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 139 states have (on average 1.2302158273381294) internal successors, (171), 145 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:14:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2021-10-21 20:14:00,087 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 32 [2021-10-21 20:14:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:14:00,087 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2021-10-21 20:14:00,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-10-21 20:14:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2021-10-21 20:14:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:14:00,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:14:00,089 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:14:00,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:14:00,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 20:14:00,302 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:14:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:14:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1488876978, now seen corresponding path program 3 times [2021-10-21 20:14:00,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:14:00,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951502938] [2021-10-21 20:14:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:14:00,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:14:00,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:14:00,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400155720] [2021-10-21 20:14:00,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:14:00,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:14:00,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:14:00,325 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:14:00,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 20:14:00,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:14:00,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:14:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 20:14:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:14:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 20:14:10,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:14:10,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951502938] [2021-10-21 20:14:10,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:14:10,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400155720] [2021-10-21 20:14:10,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400155720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:14:10,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:14:10,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-21 20:14:10,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166872011] [2021-10-21 20:14:10,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 20:14:10,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:14:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 20:14:10,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=144, Unknown=2, NotChecked=0, Total=182 [2021-10-21 20:14:10,751 INFO L87 Difference]: Start difference. First operand 146 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2021-10-21 20:14:23,539 WARN L207 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-10-21 20:15:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:08,341 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2021-10-21 20:15:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 20:15:08,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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 37 [2021-10-21 20:15:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:08,343 INFO L225 Difference]: With dead ends: 178 [2021-10-21 20:15:08,344 INFO L226 Difference]: Without dead ends: 174 [2021-10-21 20:15:08,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 34142.4ms TimeCoverageRelationStatistics Valid=182, Invalid=463, Unknown=5, NotChecked=0, Total=650 [2021-10-21 20:15:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-10-21 20:15:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 149. [2021-10-21 20:15:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 142 states have (on average 1.232394366197183) internal successors, (175), 148 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-10-21 20:15:08,372 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 37 [2021-10-21 20:15:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:08,373 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-10-21 20:15:08,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2021-10-21 20:15:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-10-21 20:15:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:15:08,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:08,374 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:08,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:08,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:08,598 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:08,598 INFO L82 PathProgramCache]: Analyzing trace with hash 475912686, now seen corresponding path program 4 times [2021-10-21 20:15:08,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:08,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630648920] [2021-10-21 20:15:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:08,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:08,617 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:08,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827142854] [2021-10-21 20:15:08,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:15:08,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:08,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:08,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 20:15:09,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:15:09,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:09,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:15:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:10,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:10,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630648920] [2021-10-21 20:15:10,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:10,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827142854] [2021-10-21 20:15:10,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827142854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:10,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:10,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:10,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23480926] [2021-10-21 20:15:10,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:10,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:10,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:10,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:10,082 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 20:15:10,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:10,609 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2021-10-21 20:15:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:15:10,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 37 [2021-10-21 20:15:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:10,620 INFO L225 Difference]: With dead ends: 187 [2021-10-21 20:15:10,620 INFO L226 Difference]: Without dead ends: 177 [2021-10-21 20:15:10,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:15:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-21 20:15:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 163. [2021-10-21 20:15:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.2307692307692308) internal successors, (192), 162 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2021-10-21 20:15:10,664 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 37 [2021-10-21 20:15:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:10,664 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2021-10-21 20:15:10,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 20:15:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2021-10-21 20:15:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:15:10,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:10,665 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:10,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:10,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:10,874 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash 477759728, now seen corresponding path program 5 times [2021-10-21 20:15:10,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:10,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135925318] [2021-10-21 20:15:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:10,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:10,887 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:10,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648692652] [2021-10-21 20:15:10,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:15:10,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:10,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:10,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:10,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 20:15:11,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 20:15:11,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:15:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:12,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:12,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135925318] [2021-10-21 20:15:12,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:12,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648692652] [2021-10-21 20:15:12,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648692652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:12,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:12,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:12,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654464009] [2021-10-21 20:15:12,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:12,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:12,693 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 20:15:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:13,321 INFO L93 Difference]: Finished difference Result 196 states and 227 transitions. [2021-10-21 20:15:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:15:13,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 37 [2021-10-21 20:15:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:13,323 INFO L225 Difference]: With dead ends: 196 [2021-10-21 20:15:13,323 INFO L226 Difference]: Without dead ends: 192 [2021-10-21 20:15:13,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:15:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-21 20:15:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2021-10-21 20:15:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 164 states have (on average 1.2378048780487805) internal successors, (203), 170 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2021-10-21 20:15:13,373 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 37 [2021-10-21 20:15:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:13,374 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2021-10-21 20:15:13,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 20:15:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2021-10-21 20:15:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:15:13,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:13,374 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:13,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:13,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 20:15:13,575 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash -318408398, now seen corresponding path program 6 times [2021-10-21 20:15:13,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:13,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662953678] [2021-10-21 20:15:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:13,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:13,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:13,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679334647] [2021-10-21 20:15:13,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:15:13,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:13,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:13,590 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:13,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 20:15:14,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-21 20:15:14,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:14,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 20:15:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:15:14,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:14,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662953678] [2021-10-21 20:15:14,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:14,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679334647] [2021-10-21 20:15:14,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679334647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:14,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:14,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:14,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626650851] [2021-10-21 20:15:14,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:14,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:14,966 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-10-21 20:15:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:15,373 INFO L93 Difference]: Finished difference Result 203 states and 237 transitions. [2021-10-21 20:15:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:15:15,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 37 [2021-10-21 20:15:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:15,377 INFO L225 Difference]: With dead ends: 203 [2021-10-21 20:15:15,378 INFO L226 Difference]: Without dead ends: 193 [2021-10-21 20:15:15,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:15:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-21 20:15:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 180. [2021-10-21 20:15:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 173 states have (on average 1.2427745664739884) internal successors, (215), 179 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 215 transitions. [2021-10-21 20:15:15,423 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 215 transitions. Word has length 37 [2021-10-21 20:15:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:15,423 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 215 transitions. [2021-10-21 20:15:15,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-10-21 20:15:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 215 transitions. [2021-10-21 20:15:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:15:15,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:15,425 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:15,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:15,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:15,638 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:15,639 INFO L82 PathProgramCache]: Analyzing trace with hash -316561356, now seen corresponding path program 7 times [2021-10-21 20:15:15,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:15,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199797436] [2021-10-21 20:15:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:15,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:15,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:15,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561029284] [2021-10-21 20:15:15,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:15:15,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:15,657 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:15,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 20:15:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:15:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:17,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:17,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199797436] [2021-10-21 20:15:17,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:17,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561029284] [2021-10-21 20:15:17,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561029284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:17,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:17,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:17,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313302262] [2021-10-21 20:15:17,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:17,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:17,157 INFO L87 Difference]: Start difference. First operand 180 states and 215 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 20:15:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:17,904 INFO L93 Difference]: Finished difference Result 217 states and 255 transitions. [2021-10-21 20:15:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:15:17,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 37 [2021-10-21 20:15:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:17,906 INFO L225 Difference]: With dead ends: 217 [2021-10-21 20:15:17,906 INFO L226 Difference]: Without dead ends: 213 [2021-10-21 20:15:17,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:15:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-21 20:15:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 184. [2021-10-21 20:15:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 177 states have (on average 1.2429378531073447) internal successors, (220), 183 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-10-21 20:15:17,939 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 37 [2021-10-21 20:15:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:17,939 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-10-21 20:15:17,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 20:15:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-10-21 20:15:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:15:17,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:17,941 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:17,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:18,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 20:15:18,154 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1329525648, now seen corresponding path program 8 times [2021-10-21 20:15:18,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:18,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709874999] [2021-10-21 20:15:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:18,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:18,165 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:18,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866422706] [2021-10-21 20:15:18,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:15:18,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:18,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:18,168 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:18,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 20:15:18,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:15:18,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:18,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:15:18,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:19,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:19,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709874999] [2021-10-21 20:15:19,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:19,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866422706] [2021-10-21 20:15:19,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866422706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:19,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:19,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:19,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384651421] [2021-10-21 20:15:19,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:19,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:19,652 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 20:15:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:20,247 INFO L93 Difference]: Finished difference Result 213 states and 251 transitions. [2021-10-21 20:15:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:15:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 37 [2021-10-21 20:15:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:20,249 INFO L225 Difference]: With dead ends: 213 [2021-10-21 20:15:20,249 INFO L226 Difference]: Without dead ends: 203 [2021-10-21 20:15:20,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:15:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-21 20:15:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 184. [2021-10-21 20:15:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 177 states have (on average 1.2429378531073447) internal successors, (220), 183 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-10-21 20:15:20,283 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 37 [2021-10-21 20:15:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:20,283 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-10-21 20:15:20,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-10-21 20:15:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-10-21 20:15:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 20:15:20,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:20,284 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:20,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:20,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 20:15:20,498 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:20,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1146728065, now seen corresponding path program 3 times [2021-10-21 20:15:20,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:20,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904608770] [2021-10-21 20:15:20,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:20,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:20,513 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:20,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370694837] [2021-10-21 20:15:20,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:15:20,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:20,515 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:20,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 20:15:21,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:15:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:15:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:21,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:21,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904608770] [2021-10-21 20:15:21,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:21,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370694837] [2021-10-21 20:15:21,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370694837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:21,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:21,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:15:21,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484976337] [2021-10-21 20:15:21,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:21,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:21,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:21,555 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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) [2021-10-21 20:15:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:21,659 INFO L93 Difference]: Finished difference Result 214 states and 255 transitions. [2021-10-21 20:15:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:15:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 [2021-10-21 20:15:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:21,669 INFO L225 Difference]: With dead ends: 214 [2021-10-21 20:15:21,669 INFO L226 Difference]: Without dead ends: 196 [2021-10-21 20:15:21,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:15:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-21 20:15:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-10-21 20:15:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 189 states have (on average 1.2222222222222223) internal successors, (231), 195 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 231 transitions. [2021-10-21 20:15:21,720 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 231 transitions. Word has length 38 [2021-10-21 20:15:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:21,721 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 231 transitions. [2021-10-21 20:15:21,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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) [2021-10-21 20:15:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 231 transitions. [2021-10-21 20:15:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:15:21,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:21,722 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:21,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:21,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:21,938 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:21,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1188185069, now seen corresponding path program 3 times [2021-10-21 20:15:21,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:21,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261952762] [2021-10-21 20:15:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:21,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:21,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:21,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308403903] [2021-10-21 20:15:21,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:15:21,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:21,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:21,965 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:22,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 20:15:22,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:15:22,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:22,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 20:15:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 20:15:24,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:24,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261952762] [2021-10-21 20:15:24,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:24,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308403903] [2021-10-21 20:15:24,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308403903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:24,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:24,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 20:15:24,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912393492] [2021-10-21 20:15:24,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:15:24,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:24,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:15:24,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:15:24,026 INFO L87 Difference]: Start difference. First operand 196 states and 231 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:24,503 INFO L93 Difference]: Finished difference Result 254 states and 291 transitions. [2021-10-21 20:15:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:15:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-10-21 20:15:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:24,506 INFO L225 Difference]: With dead ends: 254 [2021-10-21 20:15:24,506 INFO L226 Difference]: Without dead ends: 252 [2021-10-21 20:15:24,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:15:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-21 20:15:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 196. [2021-10-21 20:15:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 189 states have (on average 1.216931216931217) internal successors, (230), 195 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 230 transitions. [2021-10-21 20:15:24,544 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 230 transitions. Word has length 39 [2021-10-21 20:15:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:24,545 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 230 transitions. [2021-10-21 20:15:24,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 230 transitions. [2021-10-21 20:15:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:15:24,546 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:24,546 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:24,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:24,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:24,760 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2085713873, now seen corresponding path program 2 times [2021-10-21 20:15:24,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:24,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585142491] [2021-10-21 20:15:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:24,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:24,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:24,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529295826] [2021-10-21 20:15:24,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:15:24,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:24,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:24,785 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:24,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 20:15:25,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:15:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 20:15:25,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:28,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:28,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585142491] [2021-10-21 20:15:28,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:28,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529295826] [2021-10-21 20:15:28,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529295826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:28,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:28,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 20:15:28,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753067496] [2021-10-21 20:15:28,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:15:28,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:15:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:15:28,297 INFO L87 Difference]: Start difference. First operand 196 states and 230 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-10-21 20:15:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:32,865 INFO L93 Difference]: Finished difference Result 242 states and 279 transitions. [2021-10-21 20:15:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:15:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 [2021-10-21 20:15:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:32,868 INFO L225 Difference]: With dead ends: 242 [2021-10-21 20:15:32,868 INFO L226 Difference]: Without dead ends: 240 [2021-10-21 20:15:32,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3731.0ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:15:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-21 20:15:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 201. [2021-10-21 20:15:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.211340206185567) internal successors, (235), 200 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 235 transitions. [2021-10-21 20:15:32,917 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 235 transitions. Word has length 39 [2021-10-21 20:15:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:32,918 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 235 transitions. [2021-10-21 20:15:32,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-10-21 20:15:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 235 transitions. [2021-10-21 20:15:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:15:32,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:32,920 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:32,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:33,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 20:15:33,146 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1047636459, now seen corresponding path program 3 times [2021-10-21 20:15:33,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:33,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046203249] [2021-10-21 20:15:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:33,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:33,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:33,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798628157] [2021-10-21 20:15:33,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:15:33,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:33,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:33,162 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:33,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 20:15:34,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:15:34,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:34,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:15:34,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 20:15:34,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:34,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046203249] [2021-10-21 20:15:34,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:34,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798628157] [2021-10-21 20:15:34,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798628157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:34,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:34,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:34,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861239370] [2021-10-21 20:15:34,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:15:34,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:15:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:15:34,461 INFO L87 Difference]: Start difference. First operand 201 states and 235 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:35,476 INFO L93 Difference]: Finished difference Result 201 states and 235 transitions. [2021-10-21 20:15:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:15:35,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-21 20:15:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:35,478 INFO L225 Difference]: With dead ends: 201 [2021-10-21 20:15:35,478 INFO L226 Difference]: Without dead ends: 187 [2021-10-21 20:15:35,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:15:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-21 20:15:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 146. [2021-10-21 20:15:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.147887323943662) internal successors, (163), 145 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2021-10-21 20:15:35,513 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 39 [2021-10-21 20:15:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:35,513 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2021-10-21 20:15:35,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2021-10-21 20:15:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 20:15:35,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:35,515 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:35,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:35,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 20:15:35,742 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash 918563244, now seen corresponding path program 9 times [2021-10-21 20:15:35,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:35,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845188182] [2021-10-21 20:15:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:35,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:35,755 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:35,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253928356] [2021-10-21 20:15:35,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:15:35,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:35,757 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:35,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 20:15:36,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:15:36,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 20:15:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-21 20:15:36,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:36,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845188182] [2021-10-21 20:15:36,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:36,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253928356] [2021-10-21 20:15:36,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253928356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:36,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:36,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 20:15:36,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222423877] [2021-10-21 20:15:36,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:15:36,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:36,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:15:36,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:15:36,992 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:37,144 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-10-21 20:15:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:15:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 20:15:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:37,146 INFO L225 Difference]: With dead ends: 146 [2021-10-21 20:15:37,146 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 20:15:37,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:15:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 20:15:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 52. [2021-10-21 20:15:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.12) internal successors, (56), 51 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) [2021-10-21 20:15:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-10-21 20:15:37,162 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 46 [2021-10-21 20:15:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:37,162 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-10-21 20:15:37,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:37,163 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-10-21 20:15:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 20:15:37,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:37,164 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:37,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:37,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 20:15:37,378 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash -309462655, now seen corresponding path program 4 times [2021-10-21 20:15:37,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:37,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034325165] [2021-10-21 20:15:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:37,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:37,390 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:37,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835513954] [2021-10-21 20:15:37,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:15:37,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:37,392 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:37,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 20:15:38,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:15:38,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:38,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:15:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:38,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:38,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034325165] [2021-10-21 20:15:38,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:38,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835513954] [2021-10-21 20:15:38,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835513954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:38,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:38,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:15:38,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124931103] [2021-10-21 20:15:38,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:15:38,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:38,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:15:38,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:15:38,631 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:38,754 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-10-21 20:15:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:15:38,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-21 20:15:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:38,756 INFO L225 Difference]: With dead ends: 69 [2021-10-21 20:15:38,756 INFO L226 Difference]: Without dead ends: 61 [2021-10-21 20:15:38,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:15:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-21 20:15:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-21 20:15:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 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) [2021-10-21 20:15:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-10-21 20:15:38,787 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 47 [2021-10-21 20:15:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:38,788 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-10-21 20:15:38,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-10-21 20:15:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 20:15:38,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:38,789 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:38,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-21 20:15:39,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:39,002 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:39,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:39,002 INFO L82 PathProgramCache]: Analyzing trace with hash 173421503, now seen corresponding path program 5 times [2021-10-21 20:15:39,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:39,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674092584] [2021-10-21 20:15:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:39,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:39,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:39,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617318559] [2021-10-21 20:15:39,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:15:39,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:39,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:39,017 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:39,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 20:15:40,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 20:15:40,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:15:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:40,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:40,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674092584] [2021-10-21 20:15:40,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:40,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617318559] [2021-10-21 20:15:40,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617318559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:40,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:40,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 20:15:40,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479411184] [2021-10-21 20:15:40,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:15:40,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:15:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:15:40,963 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-10-21 20:15:41,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:41,133 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-10-21 20:15:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 20:15:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-10-21 20:15:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:41,134 INFO L225 Difference]: With dead ends: 78 [2021-10-21 20:15:41,134 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:15:41,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:15:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:15:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-21 20:15:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 69 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) [2021-10-21 20:15:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-21 20:15:41,155 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 56 [2021-10-21 20:15:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:41,155 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-21 20:15:41,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-10-21 20:15:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-21 20:15:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-21 20:15:41,156 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:41,156 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:41,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:41,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:41,366 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:41,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1678205119, now seen corresponding path program 6 times [2021-10-21 20:15:41,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:41,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581808947] [2021-10-21 20:15:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:41,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:41,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:41,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191746389] [2021-10-21 20:15:41,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:15:41,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:41,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:41,387 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 20:15:42,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 20:15:42,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 20:15:42,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:42,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:42,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581808947] [2021-10-21 20:15:42,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:42,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191746389] [2021-10-21 20:15:42,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191746389] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:42,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:42,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:15:42,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520318729] [2021-10-21 20:15:42,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:15:42,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:15:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:15:42,805 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 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) [2021-10-21 20:15:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:43,022 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2021-10-21 20:15:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 20:15:43,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 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 [2021-10-21 20:15:43,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:43,024 INFO L225 Difference]: With dead ends: 87 [2021-10-21 20:15:43,024 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 20:15:43,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-21 20:15:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 20:15:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-21 20:15:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-10-21 20:15:43,049 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 65 [2021-10-21 20:15:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:43,049 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-10-21 20:15:43,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 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) [2021-10-21 20:15:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-10-21 20:15:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-21 20:15:43,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:43,050 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:43,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:43,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:43,251 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:43,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2144729601, now seen corresponding path program 7 times [2021-10-21 20:15:43,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:43,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730411892] [2021-10-21 20:15:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:43,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:43,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:43,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2147368701] [2021-10-21 20:15:43,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:15:43,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:43,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:43,269 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:43,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 20:15:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:15:44,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 20:15:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:44,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:44,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730411892] [2021-10-21 20:15:44,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:44,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147368701] [2021-10-21 20:15:44,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147368701] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:44,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:44,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 20:15:44,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182313264] [2021-10-21 20:15:44,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:15:44,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:15:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:15:44,866 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 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) [2021-10-21 20:15:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:45,252 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-10-21 20:15:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 20:15:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 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 [2021-10-21 20:15:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:45,254 INFO L225 Difference]: With dead ends: 96 [2021-10-21 20:15:45,254 INFO L226 Difference]: Without dead ends: 88 [2021-10-21 20:15:45,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-21 20:15:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-21 20:15:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-21 20:15:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-10-21 20:15:45,334 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 74 [2021-10-21 20:15:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:45,335 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-10-21 20:15:45,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 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) [2021-10-21 20:15:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-10-21 20:15:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-21 20:15:45,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:45,337 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:45,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:45,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 20:15:45,566 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:45,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1420645633, now seen corresponding path program 8 times [2021-10-21 20:15:45,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:45,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403868639] [2021-10-21 20:15:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:45,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:45,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:45,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397387364] [2021-10-21 20:15:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:15:45,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:45,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:45,597 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:45,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 20:15:46,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:15:46,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:15:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:47,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:47,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403868639] [2021-10-21 20:15:47,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:47,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397387364] [2021-10-21 20:15:47,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397387364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:47,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:47,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 20:15:47,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601918668] [2021-10-21 20:15:47,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:15:47,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:15:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:15:47,383 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:47,707 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-10-21 20:15:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 20:15:47,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-10-21 20:15:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:47,709 INFO L225 Difference]: With dead ends: 105 [2021-10-21 20:15:47,709 INFO L226 Difference]: Without dead ends: 97 [2021-10-21 20:15:47,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:15:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-21 20:15:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-10-21 20:15:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 96 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-10-21 20:15:47,744 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 83 [2021-10-21 20:15:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:47,745 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-10-21 20:15:47,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-10-21 20:15:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-21 20:15:47,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:47,747 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:47,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:47,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:47,950 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1980090431, now seen corresponding path program 9 times [2021-10-21 20:15:47,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:47,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272423177] [2021-10-21 20:15:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:47,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:47,989 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:47,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271102248] [2021-10-21 20:15:47,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:15:47,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:47,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:47,991 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:48,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 20:15:49,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-21 20:15:49,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:15:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:49,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:49,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272423177] [2021-10-21 20:15:49,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:49,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271102248] [2021-10-21 20:15:49,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271102248] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:49,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:49,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 20:15:49,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024342822] [2021-10-21 20:15:49,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 20:15:49,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 20:15:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:15:49,910 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:50,408 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-10-21 20:15:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 20:15:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 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 [2021-10-21 20:15:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:50,414 INFO L225 Difference]: With dead ends: 114 [2021-10-21 20:15:50,414 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 20:15:50,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 474.4ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-10-21 20:15:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 20:15:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-21 20:15:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 105 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-10-21 20:15:50,493 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 92 [2021-10-21 20:15:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:50,494 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-10-21 20:15:50,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-10-21 20:15:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-21 20:15:50,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:50,499 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:50,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:50,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:50,714 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2135431873, now seen corresponding path program 10 times [2021-10-21 20:15:50,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:50,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490900721] [2021-10-21 20:15:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:50,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:50,739 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:50,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926822381] [2021-10-21 20:15:50,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:15:50,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:50,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:50,741 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:50,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 20:15:51,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:15:51,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:15:51,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:52,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:52,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490900721] [2021-10-21 20:15:52,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:52,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926822381] [2021-10-21 20:15:52,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926822381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:52,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:52,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-21 20:15:52,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206731021] [2021-10-21 20:15:52,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 20:15:52,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 20:15:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:15:52,853 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:53,283 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-10-21 20:15:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 20:15:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-10-21 20:15:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:53,286 INFO L225 Difference]: With dead ends: 123 [2021-10-21 20:15:53,286 INFO L226 Difference]: Without dead ends: 115 [2021-10-21 20:15:53,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-10-21 20:15:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-21 20:15:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-21 20:15:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-10-21 20:15:53,330 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 101 [2021-10-21 20:15:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:53,330 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-10-21 20:15:53,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-10-21 20:15:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-21 20:15:53,332 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:53,332 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:53,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:53,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 20:15:53,542 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1405975167, now seen corresponding path program 11 times [2021-10-21 20:15:53,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:53,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236276595] [2021-10-21 20:15:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:53,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:53,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:53,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579604698] [2021-10-21 20:15:53,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:15:53,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:53,589 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:53,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 20:15:54,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-21 20:15:54,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:54,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 20:15:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:55,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:55,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236276595] [2021-10-21 20:15:55,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:55,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579604698] [2021-10-21 20:15:55,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579604698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:55,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:55,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-21 20:15:55,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127120699] [2021-10-21 20:15:55,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 20:15:55,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 20:15:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:15:55,894 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 14 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:56,401 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-10-21 20:15:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 20:15:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 14 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-10-21 20:15:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:56,403 INFO L225 Difference]: With dead ends: 132 [2021-10-21 20:15:56,403 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 20:15:56,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:15:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 20:15:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-21 20:15:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 123 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2021-10-21 20:15:56,476 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 110 [2021-10-21 20:15:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:56,477 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2021-10-21 20:15:56,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 14 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2021-10-21 20:15:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 20:15:56,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:56,480 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:56,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:56,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-21 20:15:56,706 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:56,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1415901313, now seen corresponding path program 12 times [2021-10-21 20:15:56,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:56,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926470984] [2021-10-21 20:15:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:56,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:56,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:56,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783806794] [2021-10-21 20:15:56,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:15:56,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:56,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:56,730 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:56,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-21 20:15:58,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-21 20:15:58,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:15:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 20:15:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:15:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:15:59,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:15:59,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926470984] [2021-10-21 20:15:59,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:15:59,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783806794] [2021-10-21 20:15:59,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783806794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:15:59,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:15:59,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-21 20:15:59,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311678762] [2021-10-21 20:15:59,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 20:15:59,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:15:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 20:15:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-21 20:15:59,143 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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) [2021-10-21 20:15:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:15:59,595 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-10-21 20:15:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 20:15:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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) Word has length 119 [2021-10-21 20:15:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:15:59,596 INFO L225 Difference]: With dead ends: 141 [2021-10-21 20:15:59,596 INFO L226 Difference]: Without dead ends: 133 [2021-10-21 20:15:59,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-10-21 20:15:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-21 20:15:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-21 20:15:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 132 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:15:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2021-10-21 20:15:59,669 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 119 [2021-10-21 20:15:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:15:59,669 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2021-10-21 20:15:59,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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) [2021-10-21 20:15:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2021-10-21 20:15:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-10-21 20:15:59,671 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:15:59,672 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:15:59,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-21 20:15:59,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 20:15:59,898 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:15:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:15:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash -798679873, now seen corresponding path program 13 times [2021-10-21 20:15:59,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:15:59,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675708519] [2021-10-21 20:15:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:15:59,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:15:59,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:15:59,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602037098] [2021-10-21 20:15:59,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:15:59,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:15:59,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:15:59,923 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:15:59,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-21 20:16:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:16:01,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 20:16:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:01,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:01,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675708519] [2021-10-21 20:16:01,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:01,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602037098] [2021-10-21 20:16:01,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602037098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:01,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:01,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-21 20:16:01,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014709187] [2021-10-21 20:16:01,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 20:16:01,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 20:16:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:16:01,955 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 16 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:02,434 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2021-10-21 20:16:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 20:16:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 16 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-10-21 20:16:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:02,436 INFO L225 Difference]: With dead ends: 150 [2021-10-21 20:16:02,436 INFO L226 Difference]: Without dead ends: 142 [2021-10-21 20:16:02,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 587.5ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-10-21 20:16:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-21 20:16:02,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-21 20:16:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 140 states have (on average 1.1142857142857143) internal successors, (156), 141 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2021-10-21 20:16:02,484 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 128 [2021-10-21 20:16:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:02,485 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2021-10-21 20:16:02,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 16 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2021-10-21 20:16:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-21 20:16:02,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:02,487 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:02,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:02,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 20:16:02,714 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:16:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:02,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1650469311, now seen corresponding path program 14 times [2021-10-21 20:16:02,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:02,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265589441] [2021-10-21 20:16:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:02,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:02,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:02,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574710890] [2021-10-21 20:16:02,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:16:02,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:02,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:02,750 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:02,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-21 20:16:03,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:16:03,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 20:16:03,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 847 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:04,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:04,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265589441] [2021-10-21 20:16:04,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:04,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574710890] [2021-10-21 20:16:04,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574710890] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:04,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:04,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-21 20:16:04,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877396414] [2021-10-21 20:16:04,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 20:16:04,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 20:16:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-21 20:16:04,852 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:05,386 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2021-10-21 20:16:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 20:16:05,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-10-21 20:16:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:05,400 INFO L225 Difference]: With dead ends: 159 [2021-10-21 20:16:05,400 INFO L226 Difference]: Without dead ends: 151 [2021-10-21 20:16:05,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 677.1ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-10-21 20:16:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-21 20:16:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-10-21 20:16:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 150 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2021-10-21 20:16:05,473 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 137 [2021-10-21 20:16:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:05,473 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2021-10-21 20:16:05,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2021-10-21 20:16:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-21 20:16:05,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:05,476 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:05,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:05,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 20:16:05,690 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:16:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:05,690 INFO L82 PathProgramCache]: Analyzing trace with hash 833662719, now seen corresponding path program 15 times [2021-10-21 20:16:05,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:05,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622943192] [2021-10-21 20:16:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:05,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:05,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:05,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912988887] [2021-10-21 20:16:05,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:16:05,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:05,721 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:05,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 20:16:06,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-21 20:16:06,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 20:16:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:08,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:08,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622943192] [2021-10-21 20:16:08,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:08,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912988887] [2021-10-21 20:16:08,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912988887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:08,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:08,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-21 20:16:08,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74325086] [2021-10-21 20:16:08,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:16:08,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:08,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:16:08,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:16:08,069 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 19 states, 19 states have (on average 7.684210526315789) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:08,644 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2021-10-21 20:16:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 20:16:08,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.684210526315789) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-10-21 20:16:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:08,645 INFO L225 Difference]: With dead ends: 168 [2021-10-21 20:16:08,645 INFO L226 Difference]: Without dead ends: 160 [2021-10-21 20:16:08,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 751.3ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 20:16:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-21 20:16:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-10-21 20:16:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.1139240506329113) internal successors, (176), 159 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2021-10-21 20:16:08,717 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 146 [2021-10-21 20:16:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:08,717 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2021-10-21 20:16:08,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.684210526315789) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2021-10-21 20:16:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-10-21 20:16:08,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:08,720 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:08,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-21 20:16:08,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:08,934 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:16:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:08,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1972685825, now seen corresponding path program 16 times [2021-10-21 20:16:08,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:08,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600526652] [2021-10-21 20:16:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:08,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:08,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:08,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512162633] [2021-10-21 20:16:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:16:08,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:08,965 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:09,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-21 20:16:10,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:16:10,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 20:16:10,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 0 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:11,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:11,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600526652] [2021-10-21 20:16:11,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:11,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512162633] [2021-10-21 20:16:11,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512162633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:11,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:11,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-21 20:16:11,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041801171] [2021-10-21 20:16:11,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 20:16:11,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 20:16:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:16:11,493 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 19 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:12,136 INFO L93 Difference]: Finished difference Result 177 states and 194 transitions. [2021-10-21 20:16:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-21 20:16:12,137 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 19 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-10-21 20:16:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:12,139 INFO L225 Difference]: With dead ends: 177 [2021-10-21 20:16:12,140 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 20:16:12,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 20:16:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 20:16:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-10-21 20:16:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.1137724550898203) internal successors, (186), 168 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2021-10-21 20:16:12,203 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 155 [2021-10-21 20:16:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:12,204 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2021-10-21 20:16:12,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 19 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2021-10-21 20:16:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-10-21 20:16:12,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:12,206 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:12,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:12,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:12,434 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:16:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:12,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1936445121, now seen corresponding path program 17 times [2021-10-21 20:16:12,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:12,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945084987] [2021-10-21 20:16:12,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:12,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:12,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:12,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276676790] [2021-10-21 20:16:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:16:12,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:12,452 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:12,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-21 20:16:25,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-21 20:16:25,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 20:16:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 0 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:26,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:26,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945084987] [2021-10-21 20:16:26,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:26,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276676790] [2021-10-21 20:16:26,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276676790] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:26,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:26,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-21 20:16:26,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198627867] [2021-10-21 20:16:26,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 20:16:26,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:26,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 20:16:26,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:16:26,671 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 20 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:27,400 INFO L93 Difference]: Finished difference Result 186 states and 204 transitions. [2021-10-21 20:16:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 20:16:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 20 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2021-10-21 20:16:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:27,403 INFO L225 Difference]: With dead ends: 186 [2021-10-21 20:16:27,403 INFO L226 Difference]: Without dead ends: 178 [2021-10-21 20:16:27,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:16:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-21 20:16:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-10-21 20:16:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 176 states have (on average 1.1136363636363635) internal successors, (196), 177 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2021-10-21 20:16:27,493 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 164 [2021-10-21 20:16:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:27,496 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2021-10-21 20:16:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 20 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2021-10-21 20:16:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-21 20:16:27,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:27,505 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:27,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:27,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-21 20:16:27,724 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:16:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:27,724 INFO L82 PathProgramCache]: Analyzing trace with hash 132108737, now seen corresponding path program 18 times [2021-10-21 20:16:27,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:27,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855908862] [2021-10-21 20:16:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:27,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:27,765 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:27,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695767080] [2021-10-21 20:16:27,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:16:27,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:27,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:27,767 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:27,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-21 20:16:29,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-21 20:16:29,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:16:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 20:16:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 0 proven. 1413 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:30,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:30,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855908862] [2021-10-21 20:16:30,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:30,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695767080] [2021-10-21 20:16:30,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695767080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:30,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:30,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-21 20:16:30,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292999186] [2021-10-21 20:16:30,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 20:16:30,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 20:16:30,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-21 20:16:30,552 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand has 22 states, 22 states have (on average 7.863636363636363) internal successors, (173), 21 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:31,263 INFO L93 Difference]: Finished difference Result 195 states and 214 transitions. [2021-10-21 20:16:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 20:16:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.863636363636363) internal successors, (173), 21 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2021-10-21 20:16:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:31,265 INFO L225 Difference]: With dead ends: 195 [2021-10-21 20:16:31,265 INFO L226 Difference]: Without dead ends: 187 [2021-10-21 20:16:31,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 932.9ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 20:16:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-21 20:16:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-10-21 20:16:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.1135135135135135) internal successors, (206), 186 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 206 transitions. [2021-10-21 20:16:31,338 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 206 transitions. Word has length 173 [2021-10-21 20:16:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:31,338 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 206 transitions. [2021-10-21 20:16:31,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.863636363636363) internal successors, (173), 21 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 206 transitions. [2021-10-21 20:16:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-10-21 20:16:31,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:31,339 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:31,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-21 20:16:31,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:31,542 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:16:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:31,542 INFO L82 PathProgramCache]: Analyzing trace with hash 83075967, now seen corresponding path program 19 times [2021-10-21 20:16:31,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:31,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081905639] [2021-10-21 20:16:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:31,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:31,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:31,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192040014] [2021-10-21 20:16:31,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:16:31,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:31,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:31,560 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:31,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-21 20:16:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:16:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-21 20:16:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:16:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 0 proven. 1577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:16:34,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:16:34,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081905639] [2021-10-21 20:16:34,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:16:34,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192040014] [2021-10-21 20:16:34,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192040014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:16:34,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:16:34,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-21 20:16:34,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582958030] [2021-10-21 20:16:34,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 20:16:34,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:16:34,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 20:16:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-21 20:16:34,423 INFO L87 Difference]: Start difference. First operand 187 states and 206 transitions. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 22 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:16:35,167 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2021-10-21 20:16:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 20:16:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 22 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-10-21 20:16:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:16:35,169 INFO L225 Difference]: With dead ends: 204 [2021-10-21 20:16:35,169 INFO L226 Difference]: Without dead ends: 196 [2021-10-21 20:16:35,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1042.8ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 20:16:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-21 20:16:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-10-21 20:16:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.1134020618556701) internal successors, (216), 195 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 216 transitions. [2021-10-21 20:16:35,269 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 216 transitions. Word has length 182 [2021-10-21 20:16:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:16:35,269 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 216 transitions. [2021-10-21 20:16:35,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 22 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:16:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 216 transitions. [2021-10-21 20:16:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-10-21 20:16:35,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:16:35,271 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:16:35,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:35,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-21 20:16:35,478 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:16:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:16:35,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1360848769, now seen corresponding path program 20 times [2021-10-21 20:16:35,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:16:35,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227482958] [2021-10-21 20:16:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:16:35,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:16:35,507 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:16:35,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681839860] [2021-10-21 20:16:35,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:16:35,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:16:35,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:16:35,514 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:16:35,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-21 20:16:37,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:16:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 20:16:37,089 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:16:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:16:37,442 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:16:37,442 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:16:37,444 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:37,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:37,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:37,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:37,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:37,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:37,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:16:37,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-21 20:16:37,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-21 20:16:37,653 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:16:37,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:16:37 BoogieIcfgContainer [2021-10-21 20:16:37,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:16:37,822 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:16:37,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:16:37,823 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:16:37,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:13:40" (3/4) ... [2021-10-21 20:16:37,825 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:16:37,938 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:16:37,938 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:16:37,939 INFO L168 Benchmark]: Toolchain (without parser) took 177846.18 ms. Allocated memory was 100.7 MB in the beginning and 497.0 MB in the end (delta: 396.4 MB). Free memory was 61.1 MB in the beginning and 124.2 MB in the end (delta: -63.1 MB). Peak memory consumption was 332.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:37,940 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 100.7 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:16:37,940 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.61 ms. Allocated memory is still 100.7 MB. Free memory was 60.9 MB in the beginning and 77.3 MB in the end (delta: -16.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:37,941 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.62 ms. Allocated memory is still 100.7 MB. Free memory was 77.3 MB in the beginning and 75.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:37,941 INFO L168 Benchmark]: Boogie Preprocessor took 33.25 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 74.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:37,942 INFO L168 Benchmark]: RCFGBuilder took 439.89 ms. Allocated memory is still 100.7 MB. Free memory was 74.3 MB in the beginning and 63.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:37,942 INFO L168 Benchmark]: TraceAbstraction took 176833.38 ms. Allocated memory was 100.7 MB in the beginning and 497.0 MB in the end (delta: 396.4 MB). Free memory was 63.0 MB in the beginning and 136.7 MB in the end (delta: -73.7 MB). Peak memory consumption was 328.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:37,943 INFO L168 Benchmark]: Witness Printer took 116.44 ms. Allocated memory is still 497.0 MB. Free memory was 136.7 MB in the beginning and 124.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:16:37,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 100.7 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 369.61 ms. Allocated memory is still 100.7 MB. Free memory was 60.9 MB in the beginning and 77.3 MB in the end (delta: -16.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.62 ms. Allocated memory is still 100.7 MB. Free memory was 77.3 MB in the beginning and 75.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.25 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 74.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 439.89 ms. Allocated memory is still 100.7 MB. Free memory was 74.3 MB in the beginning and 63.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 176833.38 ms. Allocated memory was 100.7 MB in the beginning and 497.0 MB in the end (delta: 396.4 MB). Free memory was 63.0 MB in the beginning and 136.7 MB in the end (delta: -73.7 MB). Peak memory consumption was 328.9 MB. Max. memory is 16.1 GB. * Witness Printer took 116.44 ms. Allocated memory is still 497.0 MB. Free memory was 136.7 MB in the beginning and 124.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=1] [L11] COND FALSE !(!(cond)) VAL [counter=1] [L11] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(a != b)) VAL [counter=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(a != b)) VAL [counter=2] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=3] [L11] COND FALSE !(!(cond)) VAL [counter=3] [L11] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(a != b)) VAL [counter=3] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=3] [L34] EXPR counter++ VAL [counter=4] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(a != b)) VAL [counter=4] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=4] [L34] EXPR counter++ VAL [counter=5] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(a != b)) VAL [counter=5] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=5] [L34] EXPR counter++ VAL [counter=6] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=6] [L11] COND FALSE !(!(cond)) VAL [counter=6] [L11] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(a != b)) VAL [counter=6] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(a != b)) VAL [counter=7] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=7] [L34] EXPR counter++ VAL [counter=8] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(a != b)) VAL [counter=8] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=8] [L34] EXPR counter++ VAL [counter=9] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(a != b)) VAL [counter=9] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=9] [L34] EXPR counter++ VAL [counter=10] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(a != b)) VAL [counter=10] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=11] [L11] COND FALSE !(!(cond)) VAL [counter=11] [L11] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(a != b)) VAL [counter=11] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=11] [L34] EXPR counter++ VAL [counter=12] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=12] [L11] COND FALSE !(!(cond)) VAL [counter=12] [L11] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(a != b)) VAL [counter=12] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=12] [L34] EXPR counter++ VAL [counter=13] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=13] [L11] COND FALSE !(!(cond)) VAL [counter=13] [L11] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(a != b)) VAL [counter=13] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=13] [L34] EXPR counter++ VAL [counter=14] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=14] [L11] COND FALSE !(!(cond)) VAL [counter=14] [L11] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(a != b)) VAL [counter=14] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=14] [L34] EXPR counter++ VAL [counter=15] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=15] [L11] COND FALSE !(!(cond)) VAL [counter=15] [L11] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(a != b)) VAL [counter=15] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=15] [L34] EXPR counter++ VAL [counter=16] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=16] [L11] COND FALSE !(!(cond)) VAL [counter=16] [L11] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(a != b)) VAL [counter=16] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=16] [L34] EXPR counter++ VAL [counter=17] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=17] [L11] COND FALSE !(!(cond)) VAL [counter=17] [L11] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(a != b)) VAL [counter=17] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=17] [L34] EXPR counter++ VAL [counter=18] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=18] [L11] COND FALSE !(!(cond)) VAL [counter=18] [L11] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(a != b)) VAL [counter=18] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=18] [L34] EXPR counter++ VAL [counter=19] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=19] [L11] COND FALSE !(!(cond)) VAL [counter=19] [L11] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(a != b)) VAL [counter=19] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=19] [L34] EXPR counter++ VAL [counter=20] [L34] COND TRUE counter++<20 [L11] COND FALSE !(!(cond)) VAL [counter=20] [L11] COND FALSE !(!(cond)) VAL [counter=20] [L11] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(a != b)) VAL [counter=20] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=20] [L34] EXPR counter++ VAL [counter=21] [L34] COND FALSE !(counter++<20) [L11] COND TRUE !(cond) VAL [counter=21] [L13] reach_error() VAL [counter=21] - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 176544.2ms, OverallIterations: 46, TraceHistogramMax: 21, EmptinessCheckTime: 57.7ms, AutomataDifference: 78383.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1527 SDtfs, 2207 SDslu, 5715 SDs, 0 SdLazy, 3770 SolverSat, 368 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 37523.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2853 GetRequests, 2228 SyntacticMatches, 1 SemanticMatches, 624 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 50728.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=201occurred in iteration=27, InterpolantAutomatonStates: 658, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1734.4ms AutomataMinimizationTime, 45 MinimizatonAttempts, 668 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 470.0ms SsaConstructionTime, 14960.4ms SatisfiabilityAnalysisTime, 40163.3ms InterpolantComputationTime, 2831 NumberOfCodeBlocks, 2741 NumberOfCodeBlocksAsserted, 164 NumberOfCheckSat, 2595 ConstructedInterpolants, 7 QuantifiedInterpolants, 14638 SizeOfPredicates, 403 NumberOfNonLiveVariables, 9667 ConjunctsInSsa, 1016 ConjunctsInUnsatCore, 45 InterpolantComputations, 7 PerfectInterpolantSequences, 165/11177 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 20:16:38,163 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-21 20:16:38,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5801e30a-5900-4185-abae-f237bcf0c244/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...