./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const4.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_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/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_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/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_876103bc-1ba3-43d5-8b4d-6551253daf16/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 e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:41:18,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:41:18,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:41:18,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:41:18,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:41:18,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:41:18,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:41:18,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:41:18,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:41:18,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:41:18,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:41:18,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:41:18,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:41:18,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:41:18,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:41:18,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:41:18,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:41:18,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:41:18,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:41:18,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:41:18,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:41:18,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:41:18,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:41:18,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:41:18,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:41:18,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:41:18,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:41:18,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:41:18,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:41:18,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:41:18,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:41:18,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:41:18,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:41:18,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:41:18,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:41:18,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:41:18,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:41:18,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:41:18,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:41:18,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:41:18,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:41:18,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:41:18,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:41:18,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:41:18,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:41:18,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:41:18,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:41:18,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:41:18,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:41:18,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:41:18,641 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:41:18,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:41:18,642 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:41:18,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:41:18,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:41:18,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:41:18,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:41:18,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:41:18,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:41:18,643 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:41:18,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:41:18,643 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:41:18,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:41:18,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:41:18,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:41:18,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:41:18,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:41:18,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:41:18,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:41:18,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:41:18,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:41:18,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:41:18,645 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:41:18,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:41:18,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:41:18,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:41:18,646 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_876103bc-1ba3-43d5-8b4d-6551253daf16/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 [2021-12-06 20:41:18,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:41:18,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:41:18,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:41:18,854 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:41:18,854 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:41:18,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-crafted/zero_sum_const4.c [2021-12-06 20:41:18,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/data/469268c10/0d6e406ee0c948d4821ead99f4b899ab/FLAG60de7868b [2021-12-06 20:41:19,274 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:41:19,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/sv-benchmarks/c/array-crafted/zero_sum_const4.c [2021-12-06 20:41:19,279 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/data/469268c10/0d6e406ee0c948d4821ead99f4b899ab/FLAG60de7868b [2021-12-06 20:41:19,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/data/469268c10/0d6e406ee0c948d4821ead99f4b899ab [2021-12-06 20:41:19,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:41:19,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:41:19,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:41:19,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:41:19,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:41:19,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505adc94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19, skipping insertion in model container [2021-12-06 20:41:19,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:41:19,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:41:19,423 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_876103bc-1ba3-43d5-8b4d-6551253daf16/sv-benchmarks/c/array-crafted/zero_sum_const4.c[406,419] [2021-12-06 20:41:19,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:41:19,444 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:41:19,453 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_876103bc-1ba3-43d5-8b4d-6551253daf16/sv-benchmarks/c/array-crafted/zero_sum_const4.c[406,419] [2021-12-06 20:41:19,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:41:19,470 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:41:19,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19 WrapperNode [2021-12-06 20:41:19,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:41:19,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:41:19,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:41:19,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:41:19,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,506 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2021-12-06 20:41:19,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:41:19,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:41:19,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:41:19,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:41:19,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:41:19,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:41:19,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:41:19,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:41:19,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (1/1) ... [2021-12-06 20:41:19,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:41:19,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:41:19,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:41:19,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:41:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:41:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:41:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:41:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 20:41:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:41:19,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:41:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:41:19,640 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:41:19,641 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:41:19,753 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:41:19,758 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:41:19,758 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-06 20:41:19,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:41:19 BoogieIcfgContainer [2021-12-06 20:41:19,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:41:19,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:41:19,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:41:19,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:41:19,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:41:19" (1/3) ... [2021-12-06 20:41:19,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a232741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:41:19, skipping insertion in model container [2021-12-06 20:41:19,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:41:19" (2/3) ... [2021-12-06 20:41:19,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a232741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:41:19, skipping insertion in model container [2021-12-06 20:41:19,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:41:19" (3/3) ... [2021-12-06 20:41:19,765 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2021-12-06 20:41:19,769 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:41:19,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:41:19,804 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:41:19,809 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 [2021-12-06 20:41:19,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:41:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 20:41:19,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:19,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:19,827 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:19,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2021-12-06 20:41:19,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:19,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48897866] [2021-12-06 20:41:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:19,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:41:19,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48897866] [2021-12-06 20:41:19,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48897866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:41:19,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:41:19,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:41:19,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56491646] [2021-12-06 20:41:19,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:41:19,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:41:19,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:41:19,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:41:19,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:41:19,982 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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) [2021-12-06 20:41:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:41:19,996 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2021-12-06 20:41:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:41:19,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 20:41:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:41:20,004 INFO L225 Difference]: With dead ends: 71 [2021-12-06 20:41:20,004 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 20:41:20,007 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 [2021-12-06 20:41:20,011 INFO L933 BasicCegarLoop]: 47 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, 47 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 [2021-12-06 20:41:20,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:41:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 20:41:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-06 20:41:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-12-06 20:41:20,043 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2021-12-06 20:41:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:41:20,044 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-12-06 20:41:20,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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) [2021-12-06 20:41:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-12-06 20:41:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 20:41:20,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:20,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:20,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:41:20,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2021-12-06 20:41:20,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:20,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794260895] [2021-12-06 20:41:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:20,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:41:20,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794260895] [2021-12-06 20:41:20,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794260895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:41:20,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:41:20,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:41:20,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523152764] [2021-12-06 20:41:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:41:20,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:41:20,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:41:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:41:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:41:20,119 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-12-06 20:41:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:41:20,171 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-12-06 20:41:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:41:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 20:41:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:41:20,172 INFO L225 Difference]: With dead ends: 63 [2021-12-06 20:41:20,172 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 20:41:20,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:41:20,174 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:41:20,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:41:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 20:41:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-12-06 20:41:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-06 20:41:20,179 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2021-12-06 20:41:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:41:20,179 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-06 20:41:20,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-12-06 20:41:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-06 20:41:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:41:20,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:20,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:20,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:41:20,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2021-12-06 20:41:20,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:20,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594634387] [2021-12-06 20:41:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:20,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:41:20,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:20,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594634387] [2021-12-06 20:41:20,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594634387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:41:20,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:41:20,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:41:20,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367584105] [2021-12-06 20:41:20,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:41:20,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:41:20,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:41:20,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:41:20,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:41:20,233 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-12-06 20:41:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:41:20,308 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-12-06 20:41:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:41:20,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 20:41:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:41:20,309 INFO L225 Difference]: With dead ends: 76 [2021-12-06 20:41:20,310 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 20:41:20,310 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 [2021-12-06 20:41:20,311 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:41:20,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:41:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 20:41:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-12-06 20:41:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-06 20:41:20,318 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2021-12-06 20:41:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:41:20,318 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-06 20:41:20,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-12-06 20:41:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-06 20:41:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 20:41:20,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:20,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:20,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:41:20,320 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2021-12-06 20:41:20,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:20,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790166972] [2021-12-06 20:41:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:20,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:41:20,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:20,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790166972] [2021-12-06 20:41:20,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790166972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:41:20,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765913802] [2021-12-06 20:41:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:20,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:20,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:41:20,386 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:41:20,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:41:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:41:20,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:41:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:41:20,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:41:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:41:20,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765913802] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:41:20,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:41:20,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 20:41:20,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475026455] [2021-12-06 20:41:20,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:41:20,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:41:20,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:41:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:41:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:41:20,603 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:41:20,668 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2021-12-06 20:41:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:41:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 20:41:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:41:20,668 INFO L225 Difference]: With dead ends: 81 [2021-12-06 20:41:20,669 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 20:41:20,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:41:20,670 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:41:20,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:41:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 20:41:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-06 20:41:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-06 20:41:20,675 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2021-12-06 20:41:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:41:20,675 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-06 20:41:20,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-06 20:41:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 20:41:20,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:20,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:20,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:41:20,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:20,879 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:20,881 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2021-12-06 20:41:20,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:20,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847793246] [2021-12-06 20:41:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:20,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:41:21,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:21,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847793246] [2021-12-06 20:41:21,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847793246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:41:21,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391045884] [2021-12-06 20:41:21,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:41:21,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:21,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:41:21,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:41:21,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:41:21,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:41:21,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:41:21,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:41:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:41:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:41:21,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:41:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:41:21,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391045884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:41:21,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:41:21,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-06 20:41:21,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530441702] [2021-12-06 20:41:21,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:41:21,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:41:21,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:41:21,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:41:21,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:41:21,292 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 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) [2021-12-06 20:41:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:41:21,374 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2021-12-06 20:41:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:41:21,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 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) Word has length 43 [2021-12-06 20:41:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:41:21,375 INFO L225 Difference]: With dead ends: 101 [2021-12-06 20:41:21,375 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 20:41:21,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:41:21,376 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:41:21,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:41:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 20:41:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-12-06 20:41:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-06 20:41:21,388 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2021-12-06 20:41:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:41:21,388 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-06 20:41:21,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 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) [2021-12-06 20:41:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-06 20:41:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 20:41:21,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:21,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:21,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:41:21,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:21,592 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2021-12-06 20:41:21,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:21,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494348691] [2021-12-06 20:41:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:21,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:41:22,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494348691] [2021-12-06 20:41:22,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494348691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:41:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120969615] [2021-12-06 20:41:22,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:41:22,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:41:22,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:41:22,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:41:22,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:41:22,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:41:22,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 20:41:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:41:22,897 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 15 treesize of output 11 [2021-12-06 20:41:24,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:41:24,345 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 15 treesize of output 16 [2021-12-06 20:41:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:41:24,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:41:35,069 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 72 treesize of output 64 [2021-12-06 20:41:35,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:41:35,079 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 246 treesize of output 215 [2021-12-06 20:41:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:41:36,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120969615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:41:36,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:41:36,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32, 27] total 70 [2021-12-06 20:41:36,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191493513] [2021-12-06 20:41:36,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:41:36,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 20:41:36,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:41:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 20:41:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=4353, Unknown=2, NotChecked=0, Total=4830 [2021-12-06 20:41:36,457 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 70 states, 70 states have (on average 2.414285714285714) internal successors, (169), 70 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:41:39,878 INFO L93 Difference]: Finished difference Result 170 states and 196 transitions. [2021-12-06 20:41:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 20:41:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.414285714285714) internal successors, (169), 70 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 20:41:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:41:39,880 INFO L225 Difference]: With dead ends: 170 [2021-12-06 20:41:39,880 INFO L226 Difference]: Without dead ends: 164 [2021-12-06 20:41:39,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 77 SyntacticMatches, 33 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1061, Invalid=8837, Unknown=2, NotChecked=0, Total=9900 [2021-12-06 20:41:39,884 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:41:39,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 127 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 641 Invalid, 0 Unknown, 1126 Unchecked, 0.3s Time] [2021-12-06 20:41:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-06 20:41:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 111. [2021-12-06 20:41:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 110 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2021-12-06 20:41:39,896 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 59 [2021-12-06 20:41:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:41:39,897 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2021-12-06 20:41:39,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.414285714285714) internal successors, (169), 70 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2021-12-06 20:41:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:41:39,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:39,900 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:39,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:41:40,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:40,102 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:40,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2021-12-06 20:41:40,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:40,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427912166] [2021-12-06 20:41:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:40,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:41:40,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427912166] [2021-12-06 20:41:40,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427912166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:41:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727461871] [2021-12-06 20:41:40,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:41:40,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:40,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:41:40,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:41:40,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:41:40,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:41:40,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:41:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:41:40,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:41:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:41:40,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:41:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:41:40,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727461871] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:41:40,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:41:40,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 20:41:40,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626030972] [2021-12-06 20:41:40,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:41:40,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:41:40,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:41:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:41:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:41:40,409 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:41:40,607 INFO L93 Difference]: Finished difference Result 249 states and 288 transitions. [2021-12-06 20:41:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:41:40,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 20:41:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:41:40,608 INFO L225 Difference]: With dead ends: 249 [2021-12-06 20:41:40,608 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 20:41:40,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:41:40,610 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 123 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:41:40,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 42 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:41:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 20:41:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2021-12-06 20:41:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.141732283464567) internal successors, (145), 127 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2021-12-06 20:41:40,625 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 61 [2021-12-06 20:41:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:41:40,625 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2021-12-06 20:41:40,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2021-12-06 20:41:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 20:41:40,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:40,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:40,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:41:40,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 20:41:40,829 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2021-12-06 20:41:40,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:40,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207138499] [2021-12-06 20:41:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:40,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 20:41:40,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:40,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207138499] [2021-12-06 20:41:40,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207138499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:41:40,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096396927] [2021-12-06 20:41:40,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:41:40,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:40,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:41:40,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:41:40,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:41:41,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 20:41:41,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:41:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:41:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:41:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 20:41:41,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:41:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 20:41:41,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096396927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:41:41,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:41:41,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 20:41:41,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655778209] [2021-12-06 20:41:41,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:41:41,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:41:41,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:41:41,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:41:41,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:41:41,210 INFO L87 Difference]: Start difference. First operand 128 states and 145 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:41,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:41:41,401 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2021-12-06 20:41:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:41:41,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 20:41:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:41:41,402 INFO L225 Difference]: With dead ends: 142 [2021-12-06 20:41:41,402 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 20:41:41,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:41:41,403 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:41:41,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 26 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:41:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 20:41:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-12-06 20:41:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-12-06 20:41:41,408 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2021-12-06 20:41:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:41:41,408 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-12-06 20:41:41,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:41:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-12-06 20:41:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 20:41:41,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:41:41,409 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:41:41,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:41:41,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:41,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:41:41,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:41:41,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2021-12-06 20:41:41,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:41:41,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714094369] [2021-12-06 20:41:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:41:41,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:41:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:41:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:41:45,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:41:45,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714094369] [2021-12-06 20:41:45,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714094369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:41:45,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353063832] [2021-12-06 20:41:45,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:41:45,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:41:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:41:45,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:41:45,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:41:45,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 20:41:45,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:41:45,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-06 20:41:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:41:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:41:51,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:41:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:41:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:41:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:41:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:41:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:41:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:41:51,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:41:51,786 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-12-06 20:41:51,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 62 treesize of output 31 [2021-12-06 20:41:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:41:51,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:44:42,065 INFO L354 Elim1Store]: treesize reduction 158, result has 61.2 percent of original size [2021-12-06 20:44:42,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 150 treesize of output 283 [2021-12-06 20:45:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:01,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353063832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:01,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:01,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 43, 48] total 136 [2021-12-06 20:45:01,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006855708] [2021-12-06 20:45:01,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:01,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-12-06 20:45:01,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-12-06 20:45:01,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=17149, Unknown=54, NotChecked=0, Total=18360 [2021-12-06 20:45:01,159 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 136 states, 136 states have (on average 1.588235294117647) internal successors, (216), 136 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:11,290 INFO L93 Difference]: Finished difference Result 141 states and 156 transitions. [2021-12-06 20:45:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 20:45:11,290 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.588235294117647) internal successors, (216), 136 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 20:45:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:11,291 INFO L225 Difference]: With dead ends: 141 [2021-12-06 20:45:11,291 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 20:45:11,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 64 SyntacticMatches, 42 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12559 ImplicationChecksByTransitivity, 185.4s TimeCoverageRelationStatistics Valid=2086, Invalid=29722, Unknown=54, NotChecked=0, Total=31862 [2021-12-06 20:45:11,299 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1017 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:11,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 176 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 701 Invalid, 0 Unknown, 1017 Unchecked, 0.4s Time] [2021-12-06 20:45:11,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 20:45:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-12-06 20:45:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.123076923076923) internal successors, (146), 130 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-12-06 20:45:11,308 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2021-12-06 20:45:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:11,308 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-12-06 20:45:11,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.588235294117647) internal successors, (216), 136 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-12-06 20:45:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 20:45:11,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:11,309 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:11,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 20:45:11,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:11,511 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2021-12-06 20:45:11,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:11,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129920159] [2021-12-06 20:45:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:11,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 20:45:11,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:11,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129920159] [2021-12-06 20:45:11,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129920159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:11,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282731760] [2021-12-06 20:45:11,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:45:11,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:11,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:11,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:11,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:45:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:11,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:45:11,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 20:45:11,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 20:45:11,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282731760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:11,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:11,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 20:45:11,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179894571] [2021-12-06 20:45:11,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:11,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 20:45:11,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 20:45:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:45:11,895 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:12,177 INFO L93 Difference]: Finished difference Result 293 states and 328 transitions. [2021-12-06 20:45:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:45:12,177 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 20:45:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:12,178 INFO L225 Difference]: With dead ends: 293 [2021-12-06 20:45:12,178 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 20:45:12,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:45:12,179 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 262 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:12,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 44 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 20:45:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 142. [2021-12-06 20:45:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1063829787234043) internal successors, (156), 141 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2021-12-06 20:45:12,186 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 79 [2021-12-06 20:45:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:12,186 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2021-12-06 20:45:12,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2021-12-06 20:45:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 20:45:12,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:12,187 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:12,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:45:12,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:45:12,388 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:12,390 INFO L85 PathProgramCache]: Analyzing trace with hash 385815078, now seen corresponding path program 8 times [2021-12-06 20:45:12,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:12,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987434649] [2021-12-06 20:45:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:12,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 20:45:12,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:12,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987434649] [2021-12-06 20:45:12,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987434649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:12,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669878998] [2021-12-06 20:45:12,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:45:12,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:12,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:12,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:12,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:45:12,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:45:12,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:45:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 20:45:12,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 20:45:12,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669878998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:12,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:12,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 20:45:12,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935657951] [2021-12-06 20:45:12,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:12,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 20:45:12,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 20:45:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:45:12,751 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:13,008 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-12-06 20:45:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:45:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 20:45:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:13,009 INFO L225 Difference]: With dead ends: 156 [2021-12-06 20:45:13,009 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 20:45:13,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:45:13,010 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 230 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:13,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 22 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:45:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 20:45:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-12-06 20:45:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-12-06 20:45:13,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2021-12-06 20:45:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:13,014 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-12-06 20:45:13,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-12-06 20:45:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 20:45:13,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:13,015 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:13,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:45:13,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:13,217 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:13,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2021-12-06 20:45:13,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:13,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904946693] [2021-12-06 20:45:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:13,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 3 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:19,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:19,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904946693] [2021-12-06 20:45:19,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904946693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:19,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204396674] [2021-12-06 20:45:19,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:45:19,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:19,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:19,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:45:19,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 20:45:19,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:19,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 154 conjunts are in the unsatisfiable core [2021-12-06 20:45:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:19,588 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 15 treesize of output 11 [2021-12-06 20:45:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:28,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:45:28,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-06 20:45:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 5 proven. 135 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:45:29,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:45:38,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204396674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:38,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:38,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 26, 21] total 105 [2021-12-06 20:45:38,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102819488] [2021-12-06 20:45:38,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:38,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-06 20:45:38,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-06 20:45:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=10343, Unknown=1, NotChecked=0, Total=10920 [2021-12-06 20:45:38,297 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 105 states, 105 states have (on average 2.5619047619047617) internal successors, (269), 105 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:58,851 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2021-12-06 20:45:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-06 20:45:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.5619047619047617) internal successors, (269), 105 states have internal predecessors, (269), 0 states have call successors, (0), 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 95 [2021-12-06 20:45:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:58,853 INFO L225 Difference]: With dead ends: 215 [2021-12-06 20:45:58,853 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 20:45:58,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 128 SyntacticMatches, 45 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15735 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=3103, Invalid=42906, Unknown=1, NotChecked=0, Total=46010 [2021-12-06 20:45:58,856 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 2772 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 4764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1414 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:58,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 208 Invalid, 4764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2772 Invalid, 0 Unknown, 1414 Unchecked, 2.1s Time] [2021-12-06 20:45:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 20:45:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 141. [2021-12-06 20:45:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1) internal successors, (154), 140 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2021-12-06 20:45:58,869 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 95 [2021-12-06 20:45:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:58,869 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2021-12-06 20:45:58,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.5619047619047617) internal successors, (269), 105 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2021-12-06 20:45:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 20:45:58,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:58,870 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:58,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:45:59,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 20:45:59,072 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1175667574, now seen corresponding path program 10 times [2021-12-06 20:45:59,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:59,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717537633] [2021-12-06 20:45:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:59,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:45:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:45:59,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717537633] [2021-12-06 20:45:59,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717537633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:45:59,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996265782] [2021-12-06 20:45:59,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:45:59,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:59,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:59,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:59,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:45:59,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:45:59,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:59,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:45:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:45:59,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:45:59,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996265782] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:59,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:45:59,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 20:45:59,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245690570] [2021-12-06 20:45:59,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:59,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:45:59,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:45:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:45:59,493 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:59,821 INFO L93 Difference]: Finished difference Result 378 states and 416 transitions. [2021-12-06 20:45:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:45:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-06 20:45:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:59,822 INFO L225 Difference]: With dead ends: 378 [2021-12-06 20:45:59,822 INFO L226 Difference]: Without dead ends: 174 [2021-12-06 20:45:59,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:45:59,823 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 339 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:59,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 43 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:45:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-06 20:45:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-12-06 20:45:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.086092715231788) internal successors, (164), 151 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2021-12-06 20:45:59,833 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 97 [2021-12-06 20:45:59,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:59,833 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2021-12-06 20:45:59,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2021-12-06 20:45:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:45:59,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:59,834 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:59,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:46:00,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:00,036 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash 302616284, now seen corresponding path program 11 times [2021-12-06 20:46:00,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:00,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501016722] [2021-12-06 20:46:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:00,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 20:46:00,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501016722] [2021-12-06 20:46:00,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501016722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089232432] [2021-12-06 20:46:00,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:46:00,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:00,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:00,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:00,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:46:00,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 20:46:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:00,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:46:00,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 20:46:00,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 20:46:00,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089232432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:00,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:00,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 20:46:00,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807454569] [2021-12-06 20:46:00,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:00,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:46:00,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:00,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:46:00,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:46:00,720 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:01,036 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2021-12-06 20:46:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:46:01,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-06 20:46:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:01,037 INFO L225 Difference]: With dead ends: 166 [2021-12-06 20:46:01,037 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 20:46:01,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-12-06 20:46:01,038 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 188 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:01,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 32 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:46:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 20:46:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2021-12-06 20:46:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-12-06 20:46:01,046 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 103 [2021-12-06 20:46:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:01,046 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-12-06 20:46:01,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-12-06 20:46:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 20:46:01,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:01,047 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:01,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 20:46:01,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 20:46:01,248 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 12 times [2021-12-06 20:46:01,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:01,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572385500] [2021-12-06 20:46:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:01,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:46:10,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:10,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572385500] [2021-12-06 20:46:10,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572385500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:10,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17133208] [2021-12-06 20:46:10,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:46:10,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:10,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:10,819 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:10,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:46:10,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 20:46:10,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:46:10,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 186 conjunts are in the unsatisfiable core [2021-12-06 20:46:10,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:16,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:46:16,621 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 17 treesize of output 18 [2021-12-06 20:46:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 221 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:46:17,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:31,488 INFO L354 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2021-12-06 20:46:31,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 176 treesize of output 301 [2021-12-06 20:46:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 20:46:32,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17133208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:32,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:32,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 32, 26] total 132 [2021-12-06 20:46:32,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607438546] [2021-12-06 20:46:32,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:32,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-12-06 20:46:32,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:32,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-12-06 20:46:32,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=16468, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 20:46:32,948 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:46:59,001 INFO L93 Difference]: Finished difference Result 262 states and 284 transitions. [2021-12-06 20:46:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-12-06 20:46:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-06 20:46:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:46:59,003 INFO L225 Difference]: With dead ends: 262 [2021-12-06 20:46:59,003 INFO L226 Difference]: Without dead ends: 258 [2021-12-06 20:46:59,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 154 SyntacticMatches, 52 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17412 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=3116, Invalid=50475, Unknown=1, NotChecked=0, Total=53592 [2021-12-06 20:46:59,005 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 3283 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 6089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 3283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2335 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:46:59,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 230 Invalid, 6089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 3283 Invalid, 0 Unknown, 2335 Unchecked, 2.3s Time] [2021-12-06 20:46:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-06 20:46:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 207. [2021-12-06 20:46:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0922330097087378) internal successors, (225), 206 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 225 transitions. [2021-12-06 20:46:59,027 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 225 transitions. Word has length 113 [2021-12-06 20:46:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:46:59,027 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 225 transitions. [2021-12-06 20:46:59,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:46:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 225 transitions. [2021-12-06 20:46:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 20:46:59,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:46:59,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:46:59,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:46:59,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:46:59,230 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:46:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:46:59,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1548943064, now seen corresponding path program 13 times [2021-12-06 20:46:59,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:46:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356449877] [2021-12-06 20:46:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:46:59,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:46:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-06 20:46:59,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:46:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356449877] [2021-12-06 20:46:59,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356449877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:46:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954160581] [2021-12-06 20:46:59,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:46:59,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:46:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:46:59,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:46:59,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:46:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:46:59,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:46:59,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:46:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-06 20:46:59,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:46:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-06 20:46:59,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954160581] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:46:59,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:46:59,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-06 20:46:59,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747937544] [2021-12-06 20:46:59,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:46:59,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 20:46:59,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:46:59,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 20:46:59,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:46:59,784 INFO L87 Difference]: Start difference. First operand 207 states and 225 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:00,198 INFO L93 Difference]: Finished difference Result 496 states and 540 transitions. [2021-12-06 20:47:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:47:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 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 115 [2021-12-06 20:47:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:00,200 INFO L225 Difference]: With dead ends: 496 [2021-12-06 20:47:00,200 INFO L226 Difference]: Without dead ends: 254 [2021-12-06 20:47:00,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-06 20:47:00,201 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 353 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:00,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 42 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:47:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-06 20:47:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 230. [2021-12-06 20:47:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.074235807860262) internal successors, (246), 229 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 246 transitions. [2021-12-06 20:47:00,218 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 246 transitions. Word has length 115 [2021-12-06 20:47:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:00,218 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 246 transitions. [2021-12-06 20:47:00,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 246 transitions. [2021-12-06 20:47:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 20:47:00,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:00,219 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:00,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 20:47:00,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:47:00,420 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash -371017236, now seen corresponding path program 14 times [2021-12-06 20:47:00,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:00,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079333111] [2021-12-06 20:47:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:00,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-06 20:47:00,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079333111] [2021-12-06 20:47:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079333111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494953053] [2021-12-06 20:47:00,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:47:00,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:00,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:00,519 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:00,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:47:00,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:47:00,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:00,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 20:47:00,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-06 20:47:00,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:47:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-06 20:47:01,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494953053] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:47:01,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:47:01,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2021-12-06 20:47:01,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709232600] [2021-12-06 20:47:01,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:47:01,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 20:47:01,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:47:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 20:47:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:47:01,027 INFO L87 Difference]: Start difference. First operand 230 states and 246 transitions. Second operand has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:47:02,073 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2021-12-06 20:47:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:47:02,074 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-06 20:47:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:47:02,075 INFO L225 Difference]: With dead ends: 475 [2021-12-06 20:47:02,075 INFO L226 Difference]: Without dead ends: 287 [2021-12-06 20:47:02,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=3275, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 20:47:02,076 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 855 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:47:02,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 59 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:47:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-06 20:47:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 260. [2021-12-06 20:47:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0656370656370657) internal successors, (276), 259 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 276 transitions. [2021-12-06 20:47:02,098 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 276 transitions. Word has length 119 [2021-12-06 20:47:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:47:02,098 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 276 transitions. [2021-12-06 20:47:02,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:47:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 276 transitions. [2021-12-06 20:47:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 20:47:02,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:47:02,099 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:47:02,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:47:02,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:47:02,301 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:47:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:47:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1520659528, now seen corresponding path program 15 times [2021-12-06 20:47:02,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:47:02,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769393973] [2021-12-06 20:47:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:47:02,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:47:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:47:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 8 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:17,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:47:17,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769393973] [2021-12-06 20:47:17,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769393973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:47:17,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985908894] [2021-12-06 20:47:17,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:47:17,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:47:17,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:47:17,692 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:47:17,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:47:17,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 20:47:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:47:17,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 240 conjunts are in the unsatisfiable core [2021-12-06 20:47:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:47:17,918 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 15 treesize of output 11 [2021-12-06 20:47:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,102 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 [2021-12-06 20:47:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:47:18,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 20:47:18,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,439 INFO L354 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2021-12-06 20:47:18,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 64 [2021-12-06 20:47:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:18,745 INFO L354 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2021-12-06 20:47:18,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 82 [2021-12-06 20:47:19,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:19,116 INFO L354 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2021-12-06 20:47:19,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 97 [2021-12-06 20:47:50,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:47:50,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:47:50,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:47:50,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:47:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:47:50,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:47:50,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:47:50,631 INFO L354 Elim1Store]: treesize reduction 207, result has 47.5 percent of original size [2021-12-06 20:47:50,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 21 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 126 treesize of output 212 [2021-12-06 20:47:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:47:51,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:49:11,258 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 210 treesize of output 186 [2021-12-06 20:49:11,339 INFO L354 Elim1Store]: treesize reduction 248, result has 5.0 percent of original size [2021-12-06 20:49:11,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 6993 treesize of output 4446 [2021-12-06 20:49:11,392 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 20:49:11,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:49:11,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2021-12-06 20:49:11,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593755517] [2021-12-06 20:49:11,393 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 20:49:11,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 20:49:11,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:49:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 20:49:11,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3010, Invalid=51980, Unknown=0, NotChecked=0, Total=54990 [2021-12-06 20:49:11,396 INFO L87 Difference]: Start difference. First operand 260 states and 276 transitions. Second operand has 99 states, 99 states have (on average 1.3232323232323233) internal successors, (131), 99 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:49:58,658 INFO L93 Difference]: Finished difference Result 454 states and 470 transitions. [2021-12-06 20:49:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 20:49:58,659 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.3232323232323233) internal successors, (131), 99 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-06 20:49:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:49:58,660 INFO L225 Difference]: With dead ends: 454 [2021-12-06 20:49:58,660 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 20:49:58,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 103 SyntacticMatches, 43 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33453 ImplicationChecksByTransitivity, 138.4s TimeCoverageRelationStatistics Valid=6679, Invalid=87263, Unknown=0, NotChecked=0, Total=93942 [2021-12-06 20:49:58,664 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1200 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 11015 mSolverCounterSat, 2508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 13523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2508 IncrementalHoareTripleChecker+Valid, 11015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:49:58,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 191 Invalid, 13523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2508 Valid, 11015 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-12-06 20:49:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 20:49:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-12-06 20:49:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0604026845637584) internal successors, (158), 149 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2021-12-06 20:49:58,676 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 131 [2021-12-06 20:49:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:49:58,676 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2021-12-06 20:49:58,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.3232323232323233) internal successors, (131), 99 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:49:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2021-12-06 20:49:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 20:49:58,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:49:58,677 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:49:58,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 20:49:58,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:49:58,879 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:49:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:49:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1596967702, now seen corresponding path program 16 times [2021-12-06 20:49:58,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:49:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427813987] [2021-12-06 20:49:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:49:58,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:49:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:50:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 20 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:50:24,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:50:24,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427813987] [2021-12-06 20:50:24,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427813987] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:50:24,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498122129] [2021-12-06 20:50:24,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:50:24,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:50:24,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:50:24,036 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:50:24,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:50:24,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:50:24,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:50:24,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 245 conjunts are in the unsatisfiable core [2021-12-06 20:50:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:50:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:50:34,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:50:45,492 INFO L354 Elim1Store]: treesize reduction 794, result has 40.2 percent of original size [2021-12-06 20:50:45,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 121 treesize of output 552 [2021-12-06 20:50:51,842 INFO L354 Elim1Store]: treesize reduction 1298, result has 2.2 percent of original size [2021-12-06 20:50:51,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 120 treesize of output 47 [2021-12-06 20:50:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 20:50:52,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498122129] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:50:52,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:50:52,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 37, 32] total 180 [2021-12-06 20:50:52,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609394590] [2021-12-06 20:50:52,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:50:52,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2021-12-06 20:50:52,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:50:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2021-12-06 20:50:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1245, Invalid=30975, Unknown=0, NotChecked=0, Total=32220 [2021-12-06 20:50:52,090 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 180 states, 180 states have (on average 2.3333333333333335) internal successors, (420), 180 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:53,821 INFO L93 Difference]: Finished difference Result 477 states and 512 transitions. [2021-12-06 20:51:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-06 20:51:53,821 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 2.3333333333333335) internal successors, (420), 180 states have internal predecessors, (420), 0 states have call successors, (0), 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 149 [2021-12-06 20:51:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:53,822 INFO L225 Difference]: With dead ends: 477 [2021-12-06 20:51:53,822 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 20:51:53,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 214 SyntacticMatches, 43 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28561 ImplicationChecksByTransitivity, 78.9s TimeCoverageRelationStatistics Valid=5015, Invalid=75925, Unknown=0, NotChecked=0, Total=80940 [2021-12-06 20:51:53,826 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 833 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 18542 mSolverCounterSat, 3296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 21838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3296 IncrementalHoareTripleChecker+Valid, 18542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:53,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 267 Invalid, 21838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3296 Valid, 18542 Invalid, 0 Unknown, 0 Unchecked, 19.4s Time] [2021-12-06 20:51:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 20:51:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 171. [2021-12-06 20:51:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0705882352941176) internal successors, (182), 170 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 182 transitions. [2021-12-06 20:51:53,843 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 182 transitions. Word has length 149 [2021-12-06 20:51:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:53,843 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 182 transitions. [2021-12-06 20:51:53,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 2.3333333333333335) internal successors, (420), 180 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 182 transitions. [2021-12-06 20:51:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 20:51:53,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:53,844 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:53,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 20:51:54,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:54,046 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:54,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash -815360266, now seen corresponding path program 17 times [2021-12-06 20:51:54,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:54,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618463391] [2021-12-06 20:51:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:54,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-12-06 20:51:54,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:54,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618463391] [2021-12-06 20:51:54,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618463391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:51:54,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098254897] [2021-12-06 20:51:54,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:51:54,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:54,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:51:54,271 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:51:54,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:51:54,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 20:51:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:51:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:51:54,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:51:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-12-06 20:51:54,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:51:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-12-06 20:51:55,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098254897] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:51:55,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:51:55,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-06 20:51:55,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873039156] [2021-12-06 20:51:55,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:51:55,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 20:51:55,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:55,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 20:51:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-12-06 20:51:55,048 INFO L87 Difference]: Start difference. First operand 171 states and 182 transitions. Second operand has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:55,794 INFO L93 Difference]: Finished difference Result 290 states and 311 transitions. [2021-12-06 20:51:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 20:51:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 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 161 [2021-12-06 20:51:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:55,796 INFO L225 Difference]: With dead ends: 290 [2021-12-06 20:51:55,796 INFO L226 Difference]: Without dead ends: 176 [2021-12-06 20:51:55,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 20:51:55,796 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 432 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:55,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 22 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:51:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-06 20:51:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 168. [2021-12-06 20:51:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0538922155688624) internal successors, (176), 167 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2021-12-06 20:51:55,813 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 161 [2021-12-06 20:51:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:55,814 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2021-12-06 20:51:55,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2021-12-06 20:51:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 20:51:55,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:55,814 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:55,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 20:51:56,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:51:56,016 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash -141283940, now seen corresponding path program 18 times [2021-12-06 20:51:56,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:56,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807413338] [2021-12-06 20:51:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:56,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 42 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:28,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807413338] [2021-12-06 20:52:28,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807413338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869013424] [2021-12-06 20:52:28,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:52:28,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:28,274 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:28,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876103bc-1ba3-43d5-8b4d-6551253daf16/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 20:52:28,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 20:52:28,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:52:28,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 290 conjunts are in the unsatisfiable core [2021-12-06 20:52:28,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:28,664 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 15 treesize of output 11 [2021-12-06 20:52:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:52:48,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:52:48,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 108 treesize of output 339 [2021-12-06 20:52:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 13 proven. 527 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 20:52:49,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:53:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 527 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 20:53:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869013424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:53:25,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:53:25,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 42, 37] total 205 [2021-12-06 20:53:25,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499204097] [2021-12-06 20:53:25,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:53:25,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2021-12-06 20:53:25,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:53:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2021-12-06 20:53:25,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1726, Invalid=40094, Unknown=0, NotChecked=0, Total=41820 [2021-12-06 20:53:25,194 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand has 205 states, 205 states have (on average 2.2878048780487803) internal successors, (469), 205 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)