./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt --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 66d5bcd82161f36b0fe448ef964e4bb1f81ca402 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:09:54,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:09:54,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:09:54,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:09:54,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:09:54,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:09:54,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:09:54,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:09:54,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:09:54,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:09:54,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:09:54,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:09:54,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:09:54,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:09:54,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:09:54,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:09:54,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:09:54,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:09:54,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:09:54,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:09:54,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:09:54,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:09:54,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:09:54,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:09:54,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:09:54,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:09:54,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:09:54,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:09:54,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:09:54,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:09:54,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:09:54,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:09:54,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:09:54,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:09:54,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:09:54,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:09:54,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:09:54,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:09:54,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:09:54,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:09:54,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:09:54,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:09:54,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:09:54,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:09:54,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:09:54,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:09:54,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:09:54,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:09:54,654 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:09:54,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:09:54,654 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:09:54,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:09:54,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:09:54,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:09:54,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:09:54,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:09:54,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:09:54,657 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:09:54,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:09:54,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:09:54,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:09:54,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:09:54,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:09:54,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:09:54,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:09:54,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:09:54,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:09:54,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:09:54,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:09:54,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:09:54,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:09:54,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:09:54,662 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_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66d5bcd82161f36b0fe448ef964e4bb1f81ca402 [2021-10-13 00:09:54,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:09:55,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:09:55,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:09:55,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:09:55,017 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:09:55,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2021-10-13 00:09:55,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/data/27c46891c/d1b26cb979d9417580739f160f1f0d2d/FLAG3de1fea1e [2021-10-13 00:09:55,549 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:09:55,549 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2021-10-13 00:09:55,556 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/data/27c46891c/d1b26cb979d9417580739f160f1f0d2d/FLAG3de1fea1e [2021-10-13 00:09:55,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/data/27c46891c/d1b26cb979d9417580739f160f1f0d2d [2021-10-13 00:09:55,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:09:55,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:09:55,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:09:55,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:09:55,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:09:55,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:09:55" (1/1) ... [2021-10-13 00:09:55,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782d819f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:55, skipping insertion in model container [2021-10-13 00:09:55,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:09:55" (1/1) ... [2021-10-13 00:09:55,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:09:55,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:09:56,163 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_0983bb22-03f4-4ec1-9070-a080a07a2d8a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2021-10-13 00:09:56,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:09:56,188 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:09:56,200 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_0983bb22-03f4-4ec1-9070-a080a07a2d8a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2021-10-13 00:09:56,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:09:56,221 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:09:56,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56 WrapperNode [2021-10-13 00:09:56,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:09:56,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:09:56,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:09:56,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:09:56,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:09:56,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:09:56,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:09:56,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:09:56,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:09:56,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:09:56,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:09:56,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:09:56,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (1/1) ... [2021-10-13 00:09:56,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:09:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:09:56,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:09:56,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:09:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:09:56,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:09:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:09:56,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:09:56,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:09:56,633 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 00:09:56,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:09:56 BoogieIcfgContainer [2021-10-13 00:09:56,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:09:56,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:09:56,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:09:56,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:09:56,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:09:55" (1/3) ... [2021-10-13 00:09:56,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb20910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:09:56, skipping insertion in model container [2021-10-13 00:09:56,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:56" (2/3) ... [2021-10-13 00:09:56,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb20910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:09:56, skipping insertion in model container [2021-10-13 00:09:56,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:09:56" (3/3) ... [2021-10-13 00:09:56,644 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.c [2021-10-13 00:09:56,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:09:56,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-13 00:09:56,699 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:09:56,706 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 00:09:56,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-13 00:09:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 00:09:56,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:09:56,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 00:09:56,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:09:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:09:56,733 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-10-13 00:09:56,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:09:56,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307101532] [2021-10-13 00:09:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:56,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:09:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:09:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:09:56,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:09:56,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307101532] [2021-10-13 00:09:56,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307101532] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:09:56,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:09:56,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:09:56,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734855989] [2021-10-13 00:09:56,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:09:56,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:09:56,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:09:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:09:56,951 INFO L87 Difference]: Start difference. First operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:09:56,986 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-10-13 00:09:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:09:56,987 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 00:09:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:09:56,995 INFO L225 Difference]: With dead ends: 62 [2021-10-13 00:09:56,995 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 00:09:56,998 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 [2021-10-13 00:09:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 00:09:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 00:09:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 27 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) [2021-10-13 00:09:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-13 00:09:57,032 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2021-10-13 00:09:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:09:57,032 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-13 00:09:57,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-13 00:09:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 00:09:57,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:09:57,033 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 00:09:57,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:09:57,034 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:09:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:09:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-13 00:09:57,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:09:57,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132369487] [2021-10-13 00:09:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:57,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:09:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:09:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:09:57,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:09:57,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132369487] [2021-10-13 00:09:57,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132369487] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:09:57,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:09:57,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:09:57,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073766129] [2021-10-13 00:09:57,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:09:57,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:09:57,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:09:57,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:09:57,218 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:09:57,313 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-13 00:09:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:09:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-13 00:09:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:09:57,315 INFO L225 Difference]: With dead ends: 31 [2021-10-13 00:09:57,315 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 00:09:57,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:09:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 00:09:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-10-13 00:09:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-13 00:09:57,322 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 6 [2021-10-13 00:09:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:09:57,322 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-13 00:09:57,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-13 00:09:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 00:09:57,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:09:57,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:09:57,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:09:57,324 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:09:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:09:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-13 00:09:57,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:09:57,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729331446] [2021-10-13 00:09:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:57,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:09:57,345 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:09:57,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705224434] [2021-10-13 00:09:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:57,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:57,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:09:57,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:09:57,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:09:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:09:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:09:57,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:09:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:09:57,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:09:57,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729331446] [2021-10-13 00:09:57,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:09:57,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705224434] [2021-10-13 00:09:57,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705224434] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:09:57,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:09:57,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:09:57,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934327635] [2021-10-13 00:09:57,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:09:57,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:09:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:09:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:09:57,567 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:09:57,667 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-10-13 00:09:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:09:57,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-13 00:09:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:09:57,673 INFO L225 Difference]: With dead ends: 46 [2021-10-13 00:09:57,673 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 00:09:57,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:09:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 00:09:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-10-13 00:09:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-10-13 00:09:57,693 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 8 [2021-10-13 00:09:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:09:57,694 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-10-13 00:09:57,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-10-13 00:09:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:09:57,695 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:09:57,695 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:09:57,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:09:57,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:57,896 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:09:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:09:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-13 00:09:57,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:09:57,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005303416] [2021-10-13 00:09:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:57,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:09:57,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:09:57,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415914458] [2021-10-13 00:09:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:57,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:57,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:09:57,929 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:09:57,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:09:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:09:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:09:57,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:09:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:09:58,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:09:58,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005303416] [2021-10-13 00:09:58,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:09:58,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415914458] [2021-10-13 00:09:58,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415914458] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:09:58,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:09:58,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:09:58,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718040926] [2021-10-13 00:09:58,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:09:58,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:09:58,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:09:58,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:09:58,101 INFO L87 Difference]: Start difference. First operand 36 states and 40 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) [2021-10-13 00:09:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:09:58,160 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-10-13 00:09:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:09:58,160 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 [2021-10-13 00:09:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:09:58,162 INFO L225 Difference]: With dead ends: 46 [2021-10-13 00:09:58,163 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 00:09:58,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:09:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 00:09:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-10-13 00:09:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-13 00:09:58,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 10 [2021-10-13 00:09:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:09:58,174 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-13 00:09:58,174 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) [2021-10-13 00:09:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-13 00:09:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:09:58,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:09:58,175 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:09:58,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:09:58,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:58,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:09:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:09:58,376 INFO L82 PathProgramCache]: Analyzing trace with hash -677045505, now seen corresponding path program 1 times [2021-10-13 00:09:58,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:09:58,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137696379] [2021-10-13 00:09:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:58,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:09:58,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:09:58,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485512673] [2021-10-13 00:09:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:58,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:09:58,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:09:58,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:09:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:09:58,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:09:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:09:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:09:58,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:09:58,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137696379] [2021-10-13 00:09:58,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:09:58,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485512673] [2021-10-13 00:09:58,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485512673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:09:58,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:09:58,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-13 00:09:58,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749011323] [2021-10-13 00:09:58,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:09:58,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:09:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:09:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:09:58,712 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:09:58,814 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-10-13 00:09:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:09:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 00:09:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:09:58,821 INFO L225 Difference]: With dead ends: 55 [2021-10-13 00:09:58,821 INFO L226 Difference]: Without dead ends: 51 [2021-10-13 00:09:58,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:09:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-13 00:09:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-10-13 00:09:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-10-13 00:09:58,829 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 16 [2021-10-13 00:09:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:09:58,829 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-10-13 00:09:58,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:58,830 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-10-13 00:09:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:09:58,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:09:58,838 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 00:09:58,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:09:59,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:59,053 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:09:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:09:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2100512702, now seen corresponding path program 1 times [2021-10-13 00:09:59,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:09:59,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722386691] [2021-10-13 00:09:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:59,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:09:59,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:09:59,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680272402] [2021-10-13 00:09:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:59,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:59,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:09:59,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:09:59,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:09:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:09:59,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:09:59,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:09:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:09:59,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:09:59,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722386691] [2021-10-13 00:09:59,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:09:59,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680272402] [2021-10-13 00:09:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680272402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:09:59,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:09:59,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-13 00:09:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991775735] [2021-10-13 00:09:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:09:59,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:09:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:09:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:09:59,344 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:09:59,427 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-10-13 00:09:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:09:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 00:09:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:09:59,429 INFO L225 Difference]: With dead ends: 53 [2021-10-13 00:09:59,429 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 00:09:59,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:09:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 00:09:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-10-13 00:09:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-13 00:09:59,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 18 [2021-10-13 00:09:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:09:59,436 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-13 00:09:59,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:09:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-13 00:09:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:09:59,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:09:59,438 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-13 00:09:59,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:09:59,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:59,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:09:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:09:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2093393681, now seen corresponding path program 2 times [2021-10-13 00:09:59,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:09:59,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651746326] [2021-10-13 00:09:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:09:59,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:09:59,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:09:59,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428229624] [2021-10-13 00:09:59,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:09:59,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:09:59,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:09:59,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:09:59,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:09:59,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:09:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:09:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 00:09:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:10:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:10:00,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:10:00,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651746326] [2021-10-13 00:10:00,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:10:00,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428229624] [2021-10-13 00:10:00,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428229624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:10:00,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:10:00,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-13 00:10:00,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106964832] [2021-10-13 00:10:00,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:10:00,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:10:00,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:10:00,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:10:00,045 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:10:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:10:00,173 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-10-13 00:10:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:10:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 00:10:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:10:00,175 INFO L225 Difference]: With dead ends: 63 [2021-10-13 00:10:00,175 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 00:10:00,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:10:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 00:10:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-10-13 00:10:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.1666666666666667) 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) [2021-10-13 00:10:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-10-13 00:10:00,184 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 24 [2021-10-13 00:10:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:10:00,184 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-10-13 00:10:00,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:10:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-10-13 00:10:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 00:10:00,186 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:10:00,186 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-10-13 00:10:00,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:10:00,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:10:00,409 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:10:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:10:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1706788820, now seen corresponding path program 2 times [2021-10-13 00:10:00,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:10:00,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664074234] [2021-10-13 00:10:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:10:00,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:10:00,422 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:10:00,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307060280] [2021-10-13 00:10:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:10:00,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:10:00,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:10:00,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:10:00,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:10:00,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 00:10:00,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:10:00,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 00:10:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:10:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 00:10:00,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:10:00,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664074234] [2021-10-13 00:10:00,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:10:00,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307060280] [2021-10-13 00:10:00,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307060280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:10:00,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:10:00,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:10:00,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86928123] [2021-10-13 00:10:00,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:10:00,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:10:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:10:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:10:00,823 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-10-13 00:10:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:10:19,852 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-10-13 00:10:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:10:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 26 [2021-10-13 00:10:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:10:19,854 INFO L225 Difference]: With dead ends: 62 [2021-10-13 00:10:19,854 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 00:10:19,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:10:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 00:10:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-10-13 00:10:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 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) [2021-10-13 00:10:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-10-13 00:10:19,860 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 26 [2021-10-13 00:10:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:10:19,861 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-10-13 00:10:19,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-10-13 00:10:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-10-13 00:10:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 00:10:19,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:10:19,862 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-10-13 00:10:19,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:10:20,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:10:20,062 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 00:10:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:10:20,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1248592163, now seen corresponding path program 3 times [2021-10-13 00:10:20,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:10:20,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730760705] [2021-10-13 00:10:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:10:20,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:10:20,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:10:20,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516600836] [2021-10-13 00:10:20,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:10:20,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:10:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:10:20,083 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:10:20,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:10:20,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 00:10:20,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:10:20,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:10:20,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:10:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:10:20,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:10:20,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730760705] [2021-10-13 00:10:20,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:10:20,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516600836] [2021-10-13 00:10:20,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516600836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:10:20,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:10:20,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-13 00:10:20,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126945723] [2021-10-13 00:10:20,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:10:20,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:10:20,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:10:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:10:20,403 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2021-10-13 00:10:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:10:20,516 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-13 00:10:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:10:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 32 [2021-10-13 00:10:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:10:20,517 INFO L225 Difference]: With dead ends: 39 [2021-10-13 00:10:20,517 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:10:20,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:10:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:10:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:10:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:10:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:10:20,519 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-10-13 00:10:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:10:20,519 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:10:20,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2021-10-13 00:10:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:10:20,520 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:10:20,522 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:10:20,523 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:10:20,523 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:10:20,523 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:10:20,523 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:10:20,523 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:10:20,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:10:20,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:10:20,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 00:10:20,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:10:20,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:10:20,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:10:20,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:10:20,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:10:20,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:10:20,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:10:20,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:10:29,942 WARN L207 SmtUtils]: Spent 7.51 s on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-10-13 00:10:33,452 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-13 00:10:33,452 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-13 00:10:33,453 INFO L860 garLoopResultBuilder]: At program point L48(lines 21 49) the Hoare annotation is: true [2021-10-13 00:10:33,453 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 00:10:33,453 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-13 00:10:33,453 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 00:10:33,453 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 00:10:33,453 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-13 00:10:33,453 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-10-13 00:10:33,454 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 (+ ULTIMATE.start_main_~t~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~a~0))) (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1))) [2021-10-13 00:10:33,454 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-10-13 00:10:33,454 INFO L853 garLoopResultBuilder]: At program point L12-5(lines 11 17) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1)) (= ULTIMATE.start_main_~s~0 (let ((.cse0 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse0) (* .cse0 .cse0) 1)))) [2021-10-13 00:10:33,454 INFO L857 garLoopResultBuilder]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2021-10-13 00:10:33,454 INFO L853 garLoopResultBuilder]: At program point L12-8(lines 36 37) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1)) (= ULTIMATE.start_main_~s~0 (let ((.cse0 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse0) (* .cse0 .cse0) 1)))) [2021-10-13 00:10:33,454 INFO L857 garLoopResultBuilder]: For program point L12-9(lines 12 15) no Hoare annotation was computed. [2021-10-13 00:10:33,454 INFO L853 garLoopResultBuilder]: At program point L12-11(lines 11 17) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1))) (.cse1 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)))) (or (and (= ULTIMATE.start_main_~a~0 1) .cse0 .cse1 (= ULTIMATE.start_main_~s~0 4)) (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 (+ ULTIMATE.start_main_~t~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~a~0))) .cse0) (and (= ULTIMATE.start_main_~t~0 1) .cse0 (= ULTIMATE.start_main_~s~0 1) .cse1))) [2021-10-13 00:10:33,455 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 00:10:33,455 INFO L857 garLoopResultBuilder]: For program point L12-12(lines 12 15) no Hoare annotation was computed. [2021-10-13 00:10:33,455 INFO L853 garLoopResultBuilder]: At program point L12-14(lines 11 17) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1))) (.cse2 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)))) (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 (= ULTIMATE.start_main_~s~0 (let ((.cse1 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse1) (* .cse1 .cse1) 1)))) (and (= ULTIMATE.start_main_~t~0 1) .cse0 (= ULTIMATE.start_main_~s~0 1) .cse2) (and (= ULTIMATE.start_main_~s~0 (+ ULTIMATE.start_main_~t~0 1)) (= ULTIMATE.start_main_~t~0 3) .cse0 .cse2))) [2021-10-13 00:10:33,455 INFO L857 garLoopResultBuilder]: For program point L12-15(lines 12 15) no Hoare annotation was computed. [2021-10-13 00:10:33,455 INFO L860 garLoopResultBuilder]: At program point L12-17(lines 11 17) the Hoare annotation is: true [2021-10-13 00:10:33,455 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-13 00:10:33,456 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-10-13 00:10:33,456 INFO L857 garLoopResultBuilder]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-10-13 00:10:33,456 INFO L857 garLoopResultBuilder]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2021-10-13 00:10:33,456 INFO L857 garLoopResultBuilder]: For program point L13-3(lines 13 14) no Hoare annotation was computed. [2021-10-13 00:10:33,456 INFO L857 garLoopResultBuilder]: For program point L13-4(lines 13 14) no Hoare annotation was computed. [2021-10-13 00:10:33,456 INFO L857 garLoopResultBuilder]: For program point L13-5(lines 13 14) no Hoare annotation was computed. [2021-10-13 00:10:33,456 INFO L857 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-10-13 00:10:33,456 INFO L853 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~t~0 (+ (* 2 ULTIMATE.start_main_~a~0) 1)))) (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 (+ ULTIMATE.start_main_~t~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~a~0))) .cse0) (and (= ULTIMATE.start_main_~t~0 1) .cse0 (= ULTIMATE.start_main_~s~0 (let ((.cse1 (div (+ (* ULTIMATE.start_main_~t~0 (- 1)) 1) (- 2)))) (+ (* 2 .cse1) (* .cse1 .cse1) 1)))))) [2021-10-13 00:10:33,457 INFO L857 garLoopResultBuilder]: For program point L30-4(lines 30 42) no Hoare annotation was computed. [2021-10-13 00:10:33,457 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-13 00:10:33,462 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:10:33,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:10:33 BoogieIcfgContainer [2021-10-13 00:10:33,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:10:33,482 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:10:33,482 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:10:33,482 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:10:33,483 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:09:56" (3/4) ... [2021-10-13 00:10:33,495 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:10:33,506 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-13 00:10:33,506 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 00:10:33,507 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:10:33,507 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:10:33,555 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:10:33,555 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:10:33,556 INFO L168 Benchmark]: Toolchain (without parser) took 37588.66 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 50.0 MB in the beginning and 100.0 MB in the end (delta: -50.0 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:10:33,557 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory was 66.5 MB in the beginning and 66.4 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:10:33,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.60 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.8 MB in the beginning and 81.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:10:33,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.14 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 79.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:10:33,558 INFO L168 Benchmark]: Boogie Preprocessor took 22.90 ms. Allocated memory is still 104.9 MB. Free memory was 79.8 MB in the beginning and 78.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:10:33,559 INFO L168 Benchmark]: RCFGBuilder took 351.37 ms. Allocated memory is still 104.9 MB. Free memory was 78.6 MB in the beginning and 68.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:10:33,559 INFO L168 Benchmark]: TraceAbstraction took 36844.10 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 68.1 MB in the beginning and 45.5 MB in the end (delta: 22.6 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:10:33,563 INFO L168 Benchmark]: Witness Printer took 73.79 ms. Allocated memory is still 125.8 MB. Free memory was 45.5 MB in the beginning and 100.0 MB in the end (delta: -54.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:10:33,566 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory was 66.5 MB in the beginning and 66.4 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 253.60 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.8 MB in the beginning and 81.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.14 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 79.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.90 ms. Allocated memory is still 104.9 MB. Free memory was 79.8 MB in the beginning and 78.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 351.37 ms. Allocated memory is still 104.9 MB. Free memory was 78.6 MB in the beginning and 68.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 36844.10 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 68.1 MB in the beginning and 45.5 MB in the end (delta: 22.6 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. * Witness Printer took 73.79 ms. Allocated memory is still 125.8 MB. Free memory was 45.5 MB in the beginning and 100.0 MB in the end (delta: -54.4 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 36764.2ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 22.0ms, AutomataDifference: 19827.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 12714.6ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 149 SDtfs, 178 SDslu, 213 SDs, 0 SdLazy, 348 SolverSat, 105 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 19234.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 402.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=7, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 82.2ms AutomataMinimizationTime, 9 MinimizatonAttempts, 32 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 33 NumberOfFragments, 289 HoareAnnotationTreeSize, 8 FomulaSimplifications, 1202 FormulaSimplificationTreeSizeReduction, 110.0ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 182 FormulaSimplificationTreeSizeReductionInter, 12597.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 66.4ms SsaConstructionTime, 219.9ms SatisfiabilityAnalysisTime, 1549.8ms InterpolantComputationTime, 146 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 845 SizeOfPredicates, 33 NumberOfNonLiveVariables, 570 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 60/91 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 - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (1 == cond && s == t + a * a) && t == 2 * a + 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((a == 1 && t == 2 * a + 1) && !(0 == cond)) && s == 4) || ((1 == cond && s == t + a * a) && t == 2 * a + 1)) || (((t == 1 && t == 2 * a + 1) && s == 1) && !(0 == cond)) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1) || (((t == 1 && t == 2 * a + 1) && s == 1) && !(0 == cond))) || (((s == t + 1 && t == 3) && t == 2 * a + 1) && !(0 == cond)) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (1 == cond && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((1 == cond && s == t + a * a) && t == 2 * a + 1) || ((t == 1 && t == 2 * a + 1) && s == 2 * ((t * -1 + 1) / -2) + (t * -1 + 1) / -2 * ((t * -1 + 1) / -2) + 1) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 00:10:33,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0983bb22-03f4-4ec1-9070-a080a07a2d8a/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...