./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/hard-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/hard-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G --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 98c9c42af626702ddf5387966d0ee6d8ed18622c4592b3b15adb184fa40ea1b1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:45:08,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:45:08,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:45:08,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:45:08,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:45:08,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:45:08,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:45:08,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:45:08,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:45:08,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:45:08,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:45:08,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:45:08,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:45:08,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:45:08,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:45:08,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:45:08,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:45:08,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:45:08,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:45:08,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:45:08,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:45:08,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:45:08,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:45:08,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:45:08,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:45:08,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:45:08,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:45:08,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:45:08,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:45:08,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:45:08,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:45:08,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:45:08,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:45:08,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:45:08,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:45:08,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:45:08,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:45:08,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:45:08,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:45:08,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:45:08,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:45:08,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:45:08,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:45:08,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:45:08,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:45:08,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:45:08,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:45:08,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:45:08,626 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:45:08,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:45:08,627 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:45:08,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:45:08,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:45:08,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:45:08,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:45:08,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:45:08,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:45:08,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:45:08,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:45:08,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:45:08,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:45:08,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:45:08,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:45:08,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:45:08,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:45:08,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:45:08,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:45:08,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:45:08,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:45:08,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:45:08,630 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:45:08,631 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:45:08,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:45:08,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:45:08,631 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_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c9c42af626702ddf5387966d0ee6d8ed18622c4592b3b15adb184fa40ea1b1 [2021-11-23 12:45:08,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:45:08,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:45:08,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:45:09,000 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:45:09,001 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:45:09,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/nla-digbench/hard-u.c [2021-11-23 12:45:09,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/data/24745145c/a84237684d2a464ab6682f8875248112/FLAGf891efee1 [2021-11-23 12:45:09,590 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:45:09,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/sv-benchmarks/c/nla-digbench/hard-u.c [2021-11-23 12:45:09,604 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/data/24745145c/a84237684d2a464ab6682f8875248112/FLAGf891efee1 [2021-11-23 12:45:09,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/data/24745145c/a84237684d2a464ab6682f8875248112 [2021-11-23 12:45:09,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:45:09,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:45:09,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:45:09,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:45:09,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:45:09,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:45:09" (1/1) ... [2021-11-23 12:45:09,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31799327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:09, skipping insertion in model container [2021-11-23 12:45:09,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:45:09" (1/1) ... [2021-11-23 12:45:09,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:45:09,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:45:10,139 WARN L230 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_8ca80ffd-ba30-42dc-8e9a-693aff484365/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2021-11-23 12:45:10,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:45:10,165 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:45:10,177 WARN L230 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_8ca80ffd-ba30-42dc-8e9a-693aff484365/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2021-11-23 12:45:10,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:45:10,197 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:45:10,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10 WrapperNode [2021-11-23 12:45:10,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:45:10,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:45:10,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:45:10,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:45:10,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,263 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 91 [2021-11-23 12:45:10,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:45:10,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:45:10,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:45:10,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:45:10,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:45:10,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:45:10,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:45:10,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:45:10,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (1/1) ... [2021-11-23 12:45:10,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:45:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:45:10,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:45:10,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:45:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:45:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:45:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:45:10,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:45:10,475 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:45:10,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:45:10,658 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:45:10,665 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:45:10,665 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 12:45:10,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:45:10 BoogieIcfgContainer [2021-11-23 12:45:10,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:45:10,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:45:10,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:45:10,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:45:10,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:45:09" (1/3) ... [2021-11-23 12:45:10,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ac7c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:45:10, skipping insertion in model container [2021-11-23 12:45:10,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:45:10" (2/3) ... [2021-11-23 12:45:10,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ac7c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:45:10, skipping insertion in model container [2021-11-23 12:45:10,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:45:10" (3/3) ... [2021-11-23 12:45:10,679 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.c [2021-11-23 12:45:10,685 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:45:10,685 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-23 12:45:10,784 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:45:10,792 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:45:10,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-23 12:45:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:45:10,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:45:10,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:45:10,817 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:45:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:45:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-11-23 12:45:10,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:45:10,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474702498] [2021-11-23 12:45:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:10,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:45:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:45:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:45:11,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:45:11,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474702498] [2021-11-23 12:45:11,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474702498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:45:11,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:45:11,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:45:11,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723204482] [2021-11-23 12:45:11,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:45:11,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:45:11,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:45:11,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:45:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:45:11,079 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:45:11,098 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2021-11-23 12:45:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:45:11,101 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-23 12:45:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:45:11,109 INFO L225 Difference]: With dead ends: 79 [2021-11-23 12:45:11,110 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 12:45:11,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:45:11,117 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:45:11,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:45:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 12:45:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 12:45:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-23 12:45:11,170 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 7 [2021-11-23 12:45:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:45:11,170 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-23 12:45:11,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-23 12:45:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:45:11,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:45:11,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:45:11,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:45:11,174 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:45:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:45:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-11-23 12:45:11,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:45:11,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486401414] [2021-11-23 12:45:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:11,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:45:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:45:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:45:11,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:45:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486401414] [2021-11-23 12:45:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486401414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:45:11,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:45:11,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:45:11,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972621216] [2021-11-23 12:45:11,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:45:11,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:45:11,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:45:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:45:11,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:45:11,347 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:45:11,462 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-11-23 12:45:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:45:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-23 12:45:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:45:11,464 INFO L225 Difference]: With dead ends: 57 [2021-11-23 12:45:11,464 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 12:45:11,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:45:11,466 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 43 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:45:11,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 61 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:45:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 12:45:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-11-23 12:45:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-23 12:45:11,476 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2021-11-23 12:45:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:45:11,481 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-23 12:45:11,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-23 12:45:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 12:45:11,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:45:11,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:45:11,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:45:11,485 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:45:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:45:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1186787538, now seen corresponding path program 1 times [2021-11-23 12:45:11,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:45:11,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566624976] [2021-11-23 12:45:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:11,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:45:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:45:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:45:11,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:45:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566624976] [2021-11-23 12:45:11,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566624976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:45:11,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:45:11,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:45:11,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980498136] [2021-11-23 12:45:11,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:45:11,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:45:11,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:45:11,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:45:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:45:11,641 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:45:11,720 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-11-23 12:45:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:45:11,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-23 12:45:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:45:11,723 INFO L225 Difference]: With dead ends: 55 [2021-11-23 12:45:11,723 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 12:45:11,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:45:11,725 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:45:11,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 55 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:45:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 12:45:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2021-11-23 12:45:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-23 12:45:11,734 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 9 [2021-11-23 12:45:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:45:11,735 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-23 12:45:11,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:11,735 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-23 12:45:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:45:11,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:45:11,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:45:11,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:45:11,737 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:45:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:45:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1958320619, now seen corresponding path program 1 times [2021-11-23 12:45:11,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:45:11,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74076578] [2021-11-23 12:45:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:11,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:45:11,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:45:11,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429339199] [2021-11-23 12:45:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:11,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:45:11,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:45:11,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:45:11,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:45:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:45:11,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:45:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:45:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:45:12,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:45:12,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:45:12,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74076578] [2021-11-23 12:45:12,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:45:12,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429339199] [2021-11-23 12:45:12,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429339199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:45:12,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:45:12,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:45:12,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051633435] [2021-11-23 12:45:12,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:45:12,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:45:12,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:45:12,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:45:12,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:45:12,006 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:14,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:45:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:45:14,308 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-23 12:45:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:45:14,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:45:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:45:14,310 INFO L225 Difference]: With dead ends: 62 [2021-11-23 12:45:14,310 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 12:45:14,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:45:14,312 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:45:14,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 63 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 12:45:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 12:45:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-11-23 12:45:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-11-23 12:45:14,323 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 11 [2021-11-23 12:45:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:45:14,324 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-11-23 12:45:14,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-11-23 12:45:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 12:45:14,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:45:14,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:45:14,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:45:14,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:45:14,539 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:45:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:45:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash 532786181, now seen corresponding path program 1 times [2021-11-23 12:45:14,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:45:14,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515693914] [2021-11-23 12:45:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:14,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:45:14,556 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:45:14,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548362168] [2021-11-23 12:45:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:14,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:45:14,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:45:14,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:45:14,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:45:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:45:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:45:14,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:45:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:45:14,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:45:14,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:45:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515693914] [2021-11-23 12:45:14,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:45:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548362168] [2021-11-23 12:45:14,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548362168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:45:14,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:45:14,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:45:14,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530404470] [2021-11-23 12:45:14,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:45:14,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:45:14,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:45:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:45:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:45:14,918 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:45:15,210 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-11-23 12:45:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:45:15,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-23 12:45:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:45:15,214 INFO L225 Difference]: With dead ends: 68 [2021-11-23 12:45:15,214 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 12:45:15,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:45:15,216 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:45:15,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 87 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:45:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 12:45:15,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-23 12:45:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-23 12:45:15,226 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 15 [2021-11-23 12:45:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:45:15,226 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-23 12:45:15,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-23 12:45:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 12:45:15,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:45:15,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:45:15,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:45:15,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:45:15,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:45:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:45:15,453 INFO L85 PathProgramCache]: Analyzing trace with hash 832660248, now seen corresponding path program 1 times [2021-11-23 12:45:15,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:45:15,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073778550] [2021-11-23 12:45:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:15,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:45:15,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:45:15,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801979130] [2021-11-23 12:45:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:15,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:45:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:45:15,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:45:15,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:45:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:45:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:45:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:45:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:45:15,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:45:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:45:16,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:45:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073778550] [2021-11-23 12:45:16,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:45:16,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801979130] [2021-11-23 12:45:16,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801979130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:45:16,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:45:16,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-23 12:45:16,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45596141] [2021-11-23 12:45:16,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:45:16,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:45:16,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:45:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:45:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:45:16,069 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:18,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:45:20,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 12:45:23,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 12:45:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:45:23,368 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-11-23 12:45:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:45:23,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 12:45:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:45:23,369 INFO L225 Difference]: With dead ends: 98 [2021-11-23 12:45:23,370 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 12:45:23,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:45:23,371 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 91 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:45:23,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 117 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 12:45:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 12:45:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2021-11-23 12:45:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-11-23 12:45:23,383 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 19 [2021-11-23 12:45:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:45:23,383 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-11-23 12:45:23,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:45:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-11-23 12:45:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:45:23,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:45:23,390 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:45:23,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 12:45:23,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:45:23,604 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 12:45:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:45:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash -572989095, now seen corresponding path program 1 times [2021-11-23 12:45:23,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:45:23,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267623526] [2021-11-23 12:45:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:23,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:45:23,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:45:23,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018623735] [2021-11-23 12:45:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:45:23,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:45:23,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:45:23,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:45:23,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ca80ffd-ba30-42dc-8e9a-693aff484365/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process