./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/modp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/modp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa --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 817f5f6ccae9ad487c2c79b7cbb3a82d69086f4c5d9b5c90d8a560b10cc6dfa3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:35:01,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:35:01,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:35:01,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:35:01,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:35:01,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:35:01,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:35:01,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:35:01,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:35:01,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:35:01,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:35:01,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:35:01,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:35:01,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:35:01,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:35:01,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:35:01,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:35:01,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:35:01,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:35:01,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:35:01,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:35:01,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:35:01,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:35:01,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:35:01,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:35:01,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:35:01,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:35:01,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:35:01,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:35:01,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:35:01,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:35:01,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:35:01,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:35:01,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:35:01,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:35:01,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:35:01,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:35:01,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:35:01,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:35:01,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:35:01,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:35:01,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:35:01,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:35:01,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:35:01,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:35:01,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:35:01,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:35:01,678 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:35:01,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:35:01,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:35:01,679 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:35:01,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:35:01,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:35:01,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:35:01,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:35:01,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:35:01,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:35:01,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:35:01,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:35:01,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:35:01,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:35:01,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:35:01,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:35:01,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:35:01,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:35:01,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:35:01,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:35:01,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:35:01,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:35:01,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:35:01,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:35:01,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:35:01,684 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:35:01,684 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:35:01,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:35:01,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:35:01,685 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_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 817f5f6ccae9ad487c2c79b7cbb3a82d69086f4c5d9b5c90d8a560b10cc6dfa3 [2021-12-07 00:35:01,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:35:01,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:35:01,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:35:01,906 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:35:01,907 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:35:01,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/modp.c [2021-12-07 00:35:01,957 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/data/13ed4b1a7/7ad12278bfd54e02984945406f93904b/FLAG5153a2794 [2021-12-07 00:35:02,319 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:35:02,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/sv-benchmarks/c/array-fpi/modp.c [2021-12-07 00:35:02,324 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/data/13ed4b1a7/7ad12278bfd54e02984945406f93904b/FLAG5153a2794 [2021-12-07 00:35:02,333 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/data/13ed4b1a7/7ad12278bfd54e02984945406f93904b [2021-12-07 00:35:02,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:35:02,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:35:02,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:35:02,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:35:02,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:35:02,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4031ae86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02, skipping insertion in model container [2021-12-07 00:35:02,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:35:02,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:35:02,476 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_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/sv-benchmarks/c/array-fpi/modp.c[587,600] [2021-12-07 00:35:02,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:35:02,498 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:35:02,507 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_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/sv-benchmarks/c/array-fpi/modp.c[587,600] [2021-12-07 00:35:02,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:35:02,522 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:35:02,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02 WrapperNode [2021-12-07 00:35:02,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:35:02,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:35:02,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:35:02,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:35:02,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,548 INFO L137 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-12-07 00:35:02,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:35:02,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:35:02,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:35:02,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:35:02,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:35:02,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:35:02,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:35:02,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:35:02,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (1/1) ... [2021-12-07 00:35:02,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:35:02,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:35:02,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:35:02,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:35:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:35:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:35:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:35:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:35:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 00:35:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:35:02,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:35:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:35:02,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:35:02,678 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:35:02,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:35:02,770 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:35:02,776 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:35:02,776 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 00:35:02,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:35:02 BoogieIcfgContainer [2021-12-07 00:35:02,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:35:02,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:35:02,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:35:02,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:35:02,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:35:02" (1/3) ... [2021-12-07 00:35:02,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fe917f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:35:02, skipping insertion in model container [2021-12-07 00:35:02,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:35:02" (2/3) ... [2021-12-07 00:35:02,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fe917f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:35:02, skipping insertion in model container [2021-12-07 00:35:02,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:35:02" (3/3) ... [2021-12-07 00:35:02,787 INFO L111 eAbstractionObserver]: Analyzing ICFG modp.c [2021-12-07 00:35:02,792 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:35:02,792 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:35:02,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:35:02,836 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 [2021-12-07 00:35:02,836 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:35:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2021-12-07 00:35:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:35:02,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:35:02,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:35:02,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:35:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:35:02,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-12-07 00:35:02,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:35:02,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157273843] [2021-12-07 00:35:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:35:02,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:35:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:35:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:35:02,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:35:02,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157273843] [2021-12-07 00:35:02,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157273843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:35:02,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:35:02,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:35:02,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292644201] [2021-12-07 00:35:02,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:35:02,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:35:02,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:35:03,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:35:03,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:35:03,015 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:35:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:35:03,025 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-12-07 00:35:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:35:03,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-07 00:35:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:35:03,032 INFO L225 Difference]: With dead ends: 38 [2021-12-07 00:35:03,032 INFO L226 Difference]: Without dead ends: 17 [2021-12-07 00:35:03,034 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 [2021-12-07 00:35:03,037 INFO L933 BasicCegarLoop]: 24 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, 24 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 [2021-12-07 00:35:03,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:35:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-07 00:35:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-07 00:35:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:35:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-07 00:35:03,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-12-07 00:35:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:35:03,061 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-07 00:35:03,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:35:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-07 00:35:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:35:03,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:35:03,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:35:03,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:35:03,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:35:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:35:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-12-07 00:35:03,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:35:03,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756143600] [2021-12-07 00:35:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:35:03,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:35:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:35:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:35:03,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:35:03,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756143600] [2021-12-07 00:35:03,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756143600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:35:03,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:35:03,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:35:03,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448948325] [2021-12-07 00:35:03,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:35:03,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:35:03,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:35:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:35:03,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:35:03,127 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:35:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:35:03,164 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-07 00:35:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:35:03,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-07 00:35:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:35:03,165 INFO L225 Difference]: With dead ends: 37 [2021-12-07 00:35:03,165 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 00:35:03,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:35:03,167 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:35:03,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:35:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 00:35:03,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-12-07 00:35:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-12-07 00:35:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-07 00:35:03,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-12-07 00:35:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:35:03,172 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-07 00:35:03,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:35:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-07 00:35:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-07 00:35:03,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:35:03,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:35:03,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:35:03,173 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:35:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:35:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-12-07 00:35:03,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:35:03,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481259210] [2021-12-07 00:35:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:35:03,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:35:03,196 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:35:03,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317939939] [2021-12-07 00:35:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:35:03,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:35:03,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:35:03,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:35:03,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:35:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:35:03,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:35:03,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:35:03,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:35:03,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:35:03,479 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-07 00:35:03,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-12-07 00:35:03,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:35:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:35:03,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:35:11,676 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_#t~mem11#1_4| Int) (v_ArrVal_41 Int)) (or (= (mod |v_ULTIMATE.start_main_#t~mem11#1_4| c_~N~0) 0) (< v_ArrVal_41 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (< |v_ULTIMATE.start_main_#t~mem11#1_4| (select (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_41) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-12-07 00:36:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-07 00:36:02,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:36:02,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481259210] [2021-12-07 00:36:02,058 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:36:02,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317939939] [2021-12-07 00:36:02,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317939939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:36:02,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:36:02,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-07 00:36:02,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252198004] [2021-12-07 00:36:02,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:36:02,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 00:36:02,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:36:02,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 00:36:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=199, Unknown=18, NotChecked=32, Total=342 [2021-12-07 00:36:02,062 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:36:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:36:02,904 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-12-07 00:36:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:36:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-07 00:36:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:36:02,906 INFO L225 Difference]: With dead ends: 38 [2021-12-07 00:36:02,906 INFO L226 Difference]: Without dead ends: 22 [2021-12-07 00:36:02,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 58.1s TimeCoverageRelationStatistics Valid=217, Invalid=369, Unknown=18, NotChecked=46, Total=650 [2021-12-07 00:36:02,909 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:36:02,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 79 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2021-12-07 00:36:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-07 00:36:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-07 00:36:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:36:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-07 00:36:02,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-12-07 00:36:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:36:02,915 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-07 00:36:02,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:36:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-07 00:36:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 00:36:02,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:36:02,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:36:02,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:36:03,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:36:03,118 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:36:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:36:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2021-12-07 00:36:03,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:36:03,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907584382] [2021-12-07 00:36:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:03,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:36:03,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:36:03,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913693136] [2021-12-07 00:36:03,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:36:03,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:36:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:36:03,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:36:03,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:36:03,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:36:03,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:36:03,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:36:03,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:36:03,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:36:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:36:03,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:36:03,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907584382] [2021-12-07 00:36:03,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:36:03,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913693136] [2021-12-07 00:36:03,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913693136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:36:03,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:36:03,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-07 00:36:03,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386956474] [2021-12-07 00:36:03,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:36:03,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:36:03,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:36:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:36:03,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:36:03,567 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:36:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:36:04,015 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-12-07 00:36:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:36:04,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-07 00:36:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:36:04,016 INFO L225 Difference]: With dead ends: 43 [2021-12-07 00:36:04,016 INFO L226 Difference]: Without dead ends: 36 [2021-12-07 00:36:04,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:36:04,018 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:36:04,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 39 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:36:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-07 00:36:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2021-12-07 00:36:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2021-12-07 00:36:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-07 00:36:04,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2021-12-07 00:36:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:36:04,022 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-07 00:36:04,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:36:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-07 00:36:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:36:04,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:36:04,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:36:04,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:36:04,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:36:04,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:36:04,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:36:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-12-07 00:36:04,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:36:04,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931440830] [2021-12-07 00:36:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:04,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:36:04,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:36:04,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543122841] [2021-12-07 00:36:04,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:36:04,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:36:04,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:36:04,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:36:04,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:36:04,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:36:04,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:36:04,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-07 00:36:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:04,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:36:04,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:36:04,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:36:05,234 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-07 00:36:05,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-07 00:36:05,500 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-07 00:36:05,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-12-07 00:36:06,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 212 [2021-12-07 00:36:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:36:06,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:36:15,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:36:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2021-12-07 00:36:15,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:36:15,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-12-07 00:36:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:36:18,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:36:18,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931440830] [2021-12-07 00:36:18,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:36:18,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543122841] [2021-12-07 00:36:18,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543122841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:36:18,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:36:18,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-12-07 00:36:18,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322693335] [2021-12-07 00:36:18,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:36:18,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 00:36:18,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:36:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 00:36:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=693, Unknown=3, NotChecked=0, Total=870 [2021-12-07 00:36:18,142 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-12-07 00:36:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:36:20,466 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-12-07 00:36:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 00:36:20,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-07 00:36:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:36:20,468 INFO L225 Difference]: With dead ends: 52 [2021-12-07 00:36:20,468 INFO L226 Difference]: Without dead ends: 50 [2021-12-07 00:36:20,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=380, Invalid=1099, Unknown=3, NotChecked=0, Total=1482 [2021-12-07 00:36:20,470 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 130 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:36:20,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 91 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 129 Invalid, 0 Unknown, 101 Unchecked, 0.8s Time] [2021-12-07 00:36:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-07 00:36:20,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2021-12-07 00:36:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:36:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-07 00:36:20,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2021-12-07 00:36:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:36:20,476 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-07 00:36:20,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-12-07 00:36:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-07 00:36:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-07 00:36:20,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:36:20,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:36:20,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:36:20,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:36:20,679 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:36:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:36:20,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 4 times [2021-12-07 00:36:20,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:36:20,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845774754] [2021-12-07 00:36:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:20,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:36:20,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:36:20,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119508358] [2021-12-07 00:36:20,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:36:20,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:36:20,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:36:20,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:36:20,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:36:20,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:36:20,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:36:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:36:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:36:21,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:36:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:36:21,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:36:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845774754] [2021-12-07 00:36:21,320 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:36:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119508358] [2021-12-07 00:36:21,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119508358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:36:21,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:36:21,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-07 00:36:21,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702597084] [2021-12-07 00:36:21,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:36:21,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:36:21,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:36:21,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:36:21,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:36:21,322 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:36:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:36:22,341 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-12-07 00:36:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:36:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-07 00:36:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:36:22,343 INFO L225 Difference]: With dead ends: 76 [2021-12-07 00:36:22,343 INFO L226 Difference]: Without dead ends: 69 [2021-12-07 00:36:22,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:36:22,344 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:36:22,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 102 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:36:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-07 00:36:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2021-12-07 00:36:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) 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) [2021-12-07 00:36:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-07 00:36:22,354 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2021-12-07 00:36:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:36:22,354 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-07 00:36:22,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:36:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-07 00:36:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-07 00:36:22,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:36:22,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:36:22,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:36:22,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 00:36:22,558 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:36:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:36:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 1 times [2021-12-07 00:36:22,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:36:22,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567975334] [2021-12-07 00:36:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:22,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:36:22,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:36:22,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338708443] [2021-12-07 00:36:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:36:22,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:36:22,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:36:22,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:36:22,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:36:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:36:22,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-07 00:36:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:36:22,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:36:22,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:36:22,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:36:22,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:36:23,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-12-07 00:36:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:36:23,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-12-07 00:36:25,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 249 [2021-12-07 00:36:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:36:26,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:36:31,494 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))) is different from false [2021-12-07 00:36:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-12-07 00:36:54,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:36:54,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567975334] [2021-12-07 00:36:54,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:36:54,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338708443] [2021-12-07 00:36:54,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338708443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:36:54,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:36:54,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-12-07 00:36:54,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418587731] [2021-12-07 00:36:54,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:36:54,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:36:54,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:36:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:36:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=333, Unknown=9, NotChecked=38, Total=462 [2021-12-07 00:36:54,286 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 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) [2021-12-07 00:37:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:37:05,532 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-12-07 00:37:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:37:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-07 00:37:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:37:05,533 INFO L225 Difference]: With dead ends: 65 [2021-12-07 00:37:05,533 INFO L226 Difference]: Without dead ends: 63 [2021-12-07 00:37:05,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=107, Invalid=438, Unknown=11, NotChecked=44, Total=600 [2021-12-07 00:37:05,534 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:37:05,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 108 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2021-12-07 00:37:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-07 00:37:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2021-12-07 00:37:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-12-07 00:37:05,542 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 24 [2021-12-07 00:37:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:37:05,542 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-12-07 00:37:05,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 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) [2021-12-07 00:37:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-12-07 00:37:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-07 00:37:05,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:37:05,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:37:05,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:37:05,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:37:05,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:37:05,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:37:05,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 5 times [2021-12-07 00:37:05,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:37:05,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093126987] [2021-12-07 00:37:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:37:05,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:37:05,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:37:05,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395788284] [2021-12-07 00:37:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:37:05,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:37:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:37:05,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:37:05,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:37:05,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-07 00:37:05,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:37:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-07 00:37:05,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:37:05,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:37:06,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:37:06,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:37:06,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:37:06,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:37:06,745 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:37:06,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-12-07 00:37:07,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:37:07,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:37:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:37:07,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:37:08,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 142 [2021-12-07 00:37:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:08,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:37:13,899 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 00:37:13,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-12-07 00:37:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:13,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:37:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093126987] [2021-12-07 00:37:13,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:37:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395788284] [2021-12-07 00:37:13,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395788284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:37:13,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:37:13,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-12-07 00:37:13,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426633635] [2021-12-07 00:37:13,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:37:13,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 00:37:13,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:37:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 00:37:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=734, Unknown=1, NotChecked=0, Total=870 [2021-12-07 00:37:13,911 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:37:19,514 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2021-12-07 00:37:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 00:37:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-07 00:37:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:37:19,516 INFO L225 Difference]: With dead ends: 139 [2021-12-07 00:37:19,516 INFO L226 Difference]: Without dead ends: 137 [2021-12-07 00:37:19,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=381, Invalid=1970, Unknown=1, NotChecked=0, Total=2352 [2021-12-07 00:37:19,518 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:37:19,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 270 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 346 Invalid, 0 Unknown, 373 Unchecked, 1.6s Time] [2021-12-07 00:37:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-07 00:37:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 62. [2021-12-07 00:37:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-07 00:37:19,529 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 24 [2021-12-07 00:37:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:37:19,529 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-07 00:37:19,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-07 00:37:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:37:19,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:37:19,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:37:19,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:37:19,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:37:19,732 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:37:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:37:19,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1983767408, now seen corresponding path program 6 times [2021-12-07 00:37:19,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:37:19,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251327381] [2021-12-07 00:37:19,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:37:19,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:37:19,755 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:37:19,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316384284] [2021-12-07 00:37:19,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:37:19,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:37:19,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:37:19,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:37:19,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:37:19,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 00:37:19,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:37:19,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:37:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:37:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:20,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:37:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:20,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:37:20,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251327381] [2021-12-07 00:37:20,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:37:20,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316384284] [2021-12-07 00:37:20,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316384284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:37:20,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:37:20,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-07 00:37:20,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701776262] [2021-12-07 00:37:20,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:37:20,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:37:20,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:37:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:37:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:37:20,721 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:37:21,940 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-12-07 00:37:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 00:37:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-12-07 00:37:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:37:21,941 INFO L225 Difference]: With dead ends: 136 [2021-12-07 00:37:21,941 INFO L226 Difference]: Without dead ends: 96 [2021-12-07 00:37:21,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:37:21,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:37:21,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 89 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 00:37:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-07 00:37:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2021-12-07 00:37:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-07 00:37:21,952 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 26 [2021-12-07 00:37:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:37:21,952 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-07 00:37:21,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-07 00:37:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:37:21,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:37:21,953 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:37:21,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:37:22,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:37:22,154 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:37:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:37:22,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2132742960, now seen corresponding path program 7 times [2021-12-07 00:37:22,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:37:22,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755623006] [2021-12-07 00:37:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:37:22,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:37:22,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:37:22,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361350948] [2021-12-07 00:37:22,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:37:22,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:37:22,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:37:22,175 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:37:22,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:37:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:37:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:37:22,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:37:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:22,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:37:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:23,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:37:23,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755623006] [2021-12-07 00:37:23,076 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:37:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361350948] [2021-12-07 00:37:23,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361350948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:37:23,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:37:23,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-07 00:37:23,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358810142] [2021-12-07 00:37:23,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:37:23,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:37:23,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:37:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:37:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:37:23,078 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:37:24,314 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2021-12-07 00:37:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:37:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-12-07 00:37:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:37:24,316 INFO L225 Difference]: With dead ends: 105 [2021-12-07 00:37:24,316 INFO L226 Difference]: Without dead ends: 89 [2021-12-07 00:37:24,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:37:24,317 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:37:24,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 108 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 00:37:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-07 00:37:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 50. [2021-12-07 00:37:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-12-07 00:37:24,325 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 26 [2021-12-07 00:37:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:37:24,326 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-12-07 00:37:24,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:37:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-12-07 00:37:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 00:37:24,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:37:24,327 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:37:24,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:37:24,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:37:24,529 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:37:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:37:24,530 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 8 times [2021-12-07 00:37:24,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:37:24,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127847989] [2021-12-07 00:37:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:37:24,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:37:24,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:37:24,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272720368] [2021-12-07 00:37:24,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:37:24,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:37:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:37:24,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:37:24,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:37:24,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:37:24,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:37:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 00:37:24,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:37:24,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:37:24,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:37:25,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:37:25,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:37:25,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:37:26,312 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-07 00:37:26,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-12-07 00:37:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:37:26,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:37:27,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:37:27,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:37:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:37:27,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:37:27,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 142 [2021-12-07 00:37:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:37:27,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:38:58,348 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 00:38:58,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-12-07 00:38:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 28 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:38:58,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:38:58,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127847989] [2021-12-07 00:38:58,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:38:58,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272720368] [2021-12-07 00:38:58,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272720368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:38:58,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:38:58,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-12-07 00:38:58,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508713200] [2021-12-07 00:38:58,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:38:58,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 00:38:58,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:38:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 00:38:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1293, Unknown=36, NotChecked=0, Total=1560 [2021-12-07 00:38:58,358 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:39:31,932 WARN L227 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:39:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:39:49,979 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-12-07 00:39:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-07 00:39:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-07 00:39:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:39:49,981 INFO L225 Difference]: With dead ends: 98 [2021-12-07 00:39:49,981 INFO L226 Difference]: Without dead ends: 96 [2021-12-07 00:39:49,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 138.2s TimeCoverageRelationStatistics Valid=353, Invalid=2146, Unknown=51, NotChecked=0, Total=2550 [2021-12-07 00:39:49,983 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:39:49,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 168 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 122 Invalid, 0 Unknown, 261 Unchecked, 0.5s Time] [2021-12-07 00:39:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-07 00:39:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-12-07 00:39:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 70 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:39:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-12-07 00:39:49,994 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 28 [2021-12-07 00:39:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:39:49,995 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-12-07 00:39:49,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:39:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-12-07 00:39:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-07 00:39:49,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:39:49,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:39:50,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-07 00:39:50,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:50,198 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:39:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:39:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 2 times [2021-12-07 00:39:50,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:39:50,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086981687] [2021-12-07 00:39:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:39:50,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:39:50,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:39:50,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001271863] [2021-12-07 00:39:50,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:39:50,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:39:50,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:39:50,225 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:39:50,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:39:50,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:39:50,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:39:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-07 00:39:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:39:50,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:39:50,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:39:50,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:39:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:39:50,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:39:50,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-12-07 00:39:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:39:51,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-07 00:39:51,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:39:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:39:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:39:51,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 42 [2021-12-07 00:39:54,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 486 treesize of output 366 [2021-12-07 00:39:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:39:54,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:39:59,131 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0)))) is different from false [2021-12-07 00:40:19,746 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (let ((.cse0 (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2 4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= 0 (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0))))) is different from false [2021-12-07 00:40:21,815 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (let ((.cse0 (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2 4) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse2) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0)))) is different from false [2021-12-07 00:40:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 7 not checked. [2021-12-07 00:40:26,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:40:26,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086981687] [2021-12-07 00:40:26,715 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:40:26,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001271863] [2021-12-07 00:40:26,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001271863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:40:26,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:40:26,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2021-12-07 00:40:26,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537726378] [2021-12-07 00:40:26,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:40:26,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 00:40:26,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:40:26,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 00:40:26,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=527, Unknown=13, NotChecked=150, Total=812 [2021-12-07 00:40:26,717 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 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) [2021-12-07 00:41:03,655 WARN L227 SmtUtils]: Spent 29.26s on a formula simplification. DAG size of input: 56 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:41:32,139 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((~N~0 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0)))) (forall ((~N~0 Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0))))) is different from false [2021-12-07 00:41:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:41:38,663 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-12-07 00:41:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 00:41:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-07 00:41:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:41:38,665 INFO L225 Difference]: With dead ends: 97 [2021-12-07 00:41:38,665 INFO L226 Difference]: Without dead ends: 76 [2021-12-07 00:41:38,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 104.0s TimeCoverageRelationStatistics Valid=175, Invalid=806, Unknown=27, NotChecked=252, Total=1260 [2021-12-07 00:41:38,667 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:41:38,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 102 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 121 Invalid, 0 Unknown, 210 Unchecked, 0.6s Time] [2021-12-07 00:41:38,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-07 00:41:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-12-07 00:41:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 71 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:41:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-12-07 00:41:38,678 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 32 [2021-12-07 00:41:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:41:38,679 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-12-07 00:41:38,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 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) [2021-12-07 00:41:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-12-07 00:41:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-07 00:41:38,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:41:38,680 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:41:38,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:41:38,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 00:41:38,880 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:41:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:41:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1910230140, now seen corresponding path program 3 times [2021-12-07 00:41:38,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:41:38,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353433996] [2021-12-07 00:41:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:41:38,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:41:38,892 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:41:38,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42943495] [2021-12-07 00:41:38,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:41:38,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:41:38,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:41:38,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:41:38,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:41:38,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 00:41:38,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:41:38,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-07 00:41:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:41:38,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:41:39,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:41:39,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:41:39,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:41:39,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:41:39,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 00:41:39,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-12-07 00:41:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:41:40,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2021-12-07 00:41:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:41:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:41:40,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:41:40,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:41:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:41:40,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:41:40,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:41:40,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:41:42,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 219 [2021-12-07 00:41:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:41:42,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 6 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 00:43:05,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:05,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353433996] [2021-12-07 00:43:05,418 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42943495] [2021-12-07 00:43:05,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42943495] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:05,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:43:05,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2021-12-07 00:43:05,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201987996] [2021-12-07 00:43:05,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:05,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 00:43:05,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 00:43:05,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=908, Unknown=33, NotChecked=0, Total=1122 [2021-12-07 00:43:05,420 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 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) [2021-12-07 00:43:36,555 WARN L227 SmtUtils]: Spent 20.01s on a formula simplification. DAG size of input: 62 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:44:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:23,752 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-12-07 00:44:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 00:44:23,754 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-07 00:44:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:23,755 INFO L225 Difference]: With dead ends: 137 [2021-12-07 00:44:23,756 INFO L226 Difference]: Without dead ends: 135 [2021-12-07 00:44:23,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 158.1s TimeCoverageRelationStatistics Valid=555, Invalid=2826, Unknown=41, NotChecked=0, Total=3422 [2021-12-07 00:44:23,758 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:23,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 248 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 335 Invalid, 0 Unknown, 367 Unchecked, 1.9s Time] [2021-12-07 00:44:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-07 00:44:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2021-12-07 00:44:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1875) internal successors, (114), 96 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:44:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2021-12-07 00:44:23,773 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 32 [2021-12-07 00:44:23,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:23,773 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2021-12-07 00:44:23,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 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) [2021-12-07 00:44:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2021-12-07 00:44:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-07 00:44:23,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:23,774 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:23,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:44:23,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:44:23,976 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:23,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1226631488, now seen corresponding path program 4 times [2021-12-07 00:44:23,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:23,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584776290] [2021-12-07 00:44:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:23,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:24,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:44:24,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10038859] [2021-12-07 00:44:24,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:44:24,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:24,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:24,010 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:24,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:44:24,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:44:24,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:44:24,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 00:44:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:24,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:44:24,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:44:24,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:44:24,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:44:24,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:44:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:44:24,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:24,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-12-07 00:44:25,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2021-12-07 00:44:25,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:44:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:25,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:44:26,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:26,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:26,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:26,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:26,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:44:28,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:28,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 475 treesize of output 363 [2021-12-07 00:44:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 29 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:44:29,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:45,621 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_155| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_577 Int) (~N~0 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))))) is different from false [2021-12-07 00:45:52,888 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_577 Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-07 00:45:55,682 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_157| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_577 Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_157| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |v_ULTIMATE.start_main_~i~0#1_157| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))))) is different from false [2021-12-07 00:45:58,353 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_577 Int) (|v_ULTIMATE.start_main_~i~0#1_157| Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_157| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (< |v_ULTIMATE.start_main_~i~0#1_157| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |v_ULTIMATE.start_main_~i~0#1_157| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0))))) is different from false [2021-12-07 00:46:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 3 times theorem prover too weak. 25 trivial. 16 not checked. [2021-12-07 00:46:59,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:46:59,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584776290] [2021-12-07 00:46:59,153 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:46:59,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10038859] [2021-12-07 00:46:59,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10038859] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:46:59,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:46:59,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2021-12-07 00:46:59,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762123363] [2021-12-07 00:46:59,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:46:59,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:46:59,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:46:59,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:46:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=720, Unknown=67, NotChecked=244, Total=1190 [2021-12-07 00:46:59,154 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:47:01,559 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |c_ULTIMATE.start_main_~#sum~0#1.base|) (forall ((v_ArrVal_577 Int) (|v_ULTIMATE.start_main_~i~0#1_157| Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2 4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_157| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |v_ULTIMATE.start_main_~i~0#1_157| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_157| (+ 2 |c_ULTIMATE.start_main_~i~0#1|))))) (<= 4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-12-07 00:47:03,724 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~i~0#1| 4))))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 1) (<= 5 .cse0) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |c_ULTIMATE.start_main_~#sum~0#1.base|) (forall ((v_ArrVal_577 Int) (|v_ULTIMATE.start_main_~i~0#1_157| Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse1 (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_157| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (< |v_ULTIMATE.start_main_~i~0#1_157| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (mod (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |v_ULTIMATE.start_main_~i~0#1_157| 1)) (not (= (mod (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0))))) (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) is different from false [2021-12-07 00:47:05,741 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_157| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_577 Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_157| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |v_ULTIMATE.start_main_~i~0#1_157| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))))) (= |c_ULTIMATE.start_main_~i~0#1| 1) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse3 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2)) .cse3) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (<= 5 .cse3) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) .cse2)) .cse3))))) is different from false [2021-12-07 00:47:07,761 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_577 Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) .cse2) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (<= 5 .cse2))))) is different from false [2021-12-07 00:47:09,781 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((v_ArrVal_577 Int) (|v_ULTIMATE.start_main_~i~0#1_157| Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_157| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (< |v_ULTIMATE.start_main_~i~0#1_157| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |v_ULTIMATE.start_main_~i~0#1_157| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0))))) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) .cse2) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (<= 5 .cse2))))) is different from false [2021-12-07 00:47:11,802 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_157| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_577 Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_157| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |v_ULTIMATE.start_main_~i~0#1_157| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))))) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_155| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_577 Int) (~N~0 Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (not (= (mod (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3) (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) .cse3) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (<= 5 .cse3))))) is different from false [2021-12-07 00:47:13,841 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((v_ArrVal_577 Int) (v_ArrVal_575 Int) (v_ArrVal_573 Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_573) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) .cse2) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (<= 5 .cse2)))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-07 00:47:15,895 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_156| Int)) (or (forall ((v_ArrVal_577 Int) (v_ArrVal_575 Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_156| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0))))) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) .cse2) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (<= 5 .cse2))))) is different from false [2021-12-07 00:47:32,384 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((v_ArrVal_577 Int) (v_ArrVal_575 Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_575) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_155| 4)) v_ArrVal_577))) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) .cse2) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (<= 5 .cse2))))) is different from false [2021-12-07 00:47:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:47:58,115 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2021-12-07 00:47:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-07 00:47:58,117 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 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 36 [2021-12-07 00:47:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:47:58,118 INFO L225 Difference]: With dead ends: 136 [2021-12-07 00:47:58,118 INFO L226 Difference]: Without dead ends: 134 [2021-12-07 00:47:58,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 205.4s TimeCoverageRelationStatistics Valid=229, Invalid=1061, Unknown=94, NotChecked=1066, Total=2450 [2021-12-07 00:47:58,121 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:47:58,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 264 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 160 Invalid, 0 Unknown, 473 Unchecked, 0.8s Time] [2021-12-07 00:47:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-07 00:47:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2021-12-07 00:47:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 97 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:47:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2021-12-07 00:47:58,145 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 36 [2021-12-07 00:47:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:47:58,145 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2021-12-07 00:47:58,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:47:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2021-12-07 00:47:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-07 00:47:58,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:47:58,146 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:47:58,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:47:58,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 00:47:58,348 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:47:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:47:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2089702010, now seen corresponding path program 9 times [2021-12-07 00:47:58,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:47:58,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072098986] [2021-12-07 00:47:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:47:58,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:47:58,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:47:58,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954115562] [2021-12-07 00:47:58,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:47:58,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:47:58,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:47:58,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:47:58,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:47:58,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-07 00:47:58,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:47:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 00:47:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:47:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:47:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:00,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072098986] [2021-12-07 00:48:00,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954115562] [2021-12-07 00:48:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954115562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:00,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:00,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-12-07 00:48:00,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737131340] [2021-12-07 00:48:00,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:00,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 00:48:00,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:00,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 00:48:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:48:00,194 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2021-12-07 00:48:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:04,723 INFO L93 Difference]: Finished difference Result 243 states and 265 transitions. [2021-12-07 00:48:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 00:48:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-07 00:48:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:04,726 INFO L225 Difference]: With dead ends: 243 [2021-12-07 00:48:04,726 INFO L226 Difference]: Without dead ends: 219 [2021-12-07 00:48:04,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=567, Invalid=1689, Unknown=0, NotChecked=0, Total=2256 [2021-12-07 00:48:04,728 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 194 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:04,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 477 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-07 00:48:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-07 00:48:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 92. [2021-12-07 00:48:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-12-07 00:48:04,745 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 36 [2021-12-07 00:48:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:04,745 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-12-07 00:48:04,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2021-12-07 00:48:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-12-07 00:48:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:48:04,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:04,746 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:04,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:48:04,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:48:04,948 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash 159485182, now seen corresponding path program 5 times [2021-12-07 00:48:04,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:04,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227932141] [2021-12-07 00:48:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:04,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:04,965 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:04,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828364872] [2021-12-07 00:48:04,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:48:04,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:04,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:04,966 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:04,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:48:05,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-07 00:48:05,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:05,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:48:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:48:05,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:48:06,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:06,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227932141] [2021-12-07 00:48:06,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:06,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828364872] [2021-12-07 00:48:06,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828364872] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:06,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:06,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-12-07 00:48:06,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960618749] [2021-12-07 00:48:06,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:06,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:48:06,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:48:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:48:06,625 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:08,614 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2021-12-07 00:48:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:48:08,616 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-07 00:48:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:08,617 INFO L225 Difference]: With dead ends: 209 [2021-12-07 00:48:08,617 INFO L226 Difference]: Without dead ends: 174 [2021-12-07 00:48:08,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 00:48:08,618 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 296 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:08,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 126 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-07 00:48:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-07 00:48:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 125. [2021-12-07 00:48:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.096774193548387) internal successors, (136), 124 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-12-07 00:48:08,638 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 38 [2021-12-07 00:48:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:08,638 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-12-07 00:48:08,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-12-07 00:48:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-07 00:48:08,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:08,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:08,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:48:08,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:08,841 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash -835467152, now seen corresponding path program 6 times [2021-12-07 00:48:08,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:08,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088562509] [2021-12-07 00:48:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:08,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:08,886 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:08,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712157138] [2021-12-07 00:48:08,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:48:08,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:08,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:08,888 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:08,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:48:08,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 00:48:08,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:48:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:09,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:48:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-12-07 00:48:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:09,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-07 00:48:10,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:10,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:10,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2021-12-07 00:48:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 219 [2021-12-07 00:48:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 00:48:13,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:17,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:48:17,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 218 [2021-12-07 00:48:18,138 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-07 00:48:18,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 450 treesize of output 434 [2021-12-07 00:48:21,074 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:48:21,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 450 treesize of output 442 [2021-12-07 00:48:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 442 treesize of output 414 [2021-12-07 00:48:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 00:48:28,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:28,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088562509] [2021-12-07 00:48:28,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:28,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712157138] [2021-12-07 00:48:28,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712157138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:28,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:28,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-12-07 00:48:28,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097322468] [2021-12-07 00:48:28,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:28,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 00:48:28,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 00:48:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-12-07 00:48:28,514 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:33,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:33,863 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2021-12-07 00:48:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-07 00:48:33,864 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-07 00:48:33,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:33,865 INFO L225 Difference]: With dead ends: 148 [2021-12-07 00:48:33,865 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 00:48:33,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:48:33,866 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:33,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 156 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 228 Invalid, 0 Unknown, 108 Unchecked, 1.5s Time] [2021-12-07 00:48:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 00:48:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2021-12-07 00:48:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-12-07 00:48:33,884 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 40 [2021-12-07 00:48:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:33,884 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-12-07 00:48:33,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-12-07 00:48:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-07 00:48:33,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:33,885 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:33,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:48:34,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:34,087 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:34,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1650650108, now seen corresponding path program 7 times [2021-12-07 00:48:34,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:34,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584367809] [2021-12-07 00:48:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:34,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:34,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:34,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454910641] [2021-12-07 00:48:34,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:48:34,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:34,134 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:34,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ae2a2d1-b8b7-4ad3-9c4d-b03f60fd8a3a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:48:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:34,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-07 00:48:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:34,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:48:34,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:48:34,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:48:34,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:48:34,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:48:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:48:34,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:48:34,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-07 00:48:35,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-12-07 00:48:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:35,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-07 00:48:35,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:35,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:35,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:48:36,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:48:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:48:36,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:36,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 00:48:39,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 475 treesize of output 363 [2021-12-07 00:48:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 45 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:40,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:01,353 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_236| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_236| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_235| Int) (v_ArrVal_840 Int) (~N~0 Int) (v_ArrVal_838 Int)) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_236| 4)) v_ArrVal_838) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_235| 4)) v_ArrVal_840))) (or (< |v_ULTIMATE.start_main_~i~0#1_235| (+ |v_ULTIMATE.start_main_~i~0#1_236| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))))) is different from false [2021-12-07 00:50:03,637 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_235| Int) (v_ArrVal_840 Int) (|v_ULTIMATE.start_main_~i~0#1_236| Int) (~N~0 Int) (v_ArrVal_838 Int) (v_ArrVal_835 Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_835) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_236| 4)) v_ArrVal_838) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_235| 4)) v_ArrVal_840))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_235| (+ |v_ULTIMATE.start_main_~i~0#1_236| 1)) (< |v_ULTIMATE.start_main_~i~0#1_236| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))) is different from false