./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s42if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s42if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a --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 7a409beec5345d23de858b9cfc2d898f0f9067f3e0e10973225e4b6022343f4a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:30:25,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:30:25,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:30:25,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:30:25,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:30:25,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:30:25,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:30:25,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:30:25,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:30:25,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:30:25,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:30:25,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:30:25,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:30:25,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:30:25,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:30:25,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:30:25,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:30:25,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:30:25,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:30:25,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:30:25,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:30:25,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:30:25,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:30:25,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:30:25,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:30:25,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:30:25,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:30:25,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:30:25,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:30:25,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:30:25,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:30:25,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:30:25,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:30:25,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:30:25,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:30:25,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:30:25,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:30:25,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:30:25,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:30:25,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:30:25,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:30:25,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:30:25,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:30:25,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:30:25,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:30:25,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:30:25,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:30:25,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:30:25,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:30:25,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:30:25,762 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:30:25,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:30:25,764 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:30:25,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:30:25,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:30:25,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:30:25,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:30:25,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:30:25,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:30:25,765 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:30:25,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:30:25,766 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:30:25,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:30:25,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:30:25,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:30:25,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:30:25,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:30:25,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:30:25,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:30:25,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:30:25,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:30:25,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:30:25,768 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:30:25,768 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:30:25,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:30:25,769 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_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a409beec5345d23de858b9cfc2d898f0f9067f3e0e10973225e4b6022343f4a [2022-11-21 16:30:26,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:30:26,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:30:26,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:30:26,202 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:30:26,203 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:30:26,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-fpi/s42if.c [2022-11-21 16:30:29,311 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:30:29,530 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:30:29,530 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/sv-benchmarks/c/array-fpi/s42if.c [2022-11-21 16:30:29,539 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/data/79bb63535/1da7bf48e24a4fe8956958c9ff5b54d2/FLAG9e218136b [2022-11-21 16:30:29,559 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/data/79bb63535/1da7bf48e24a4fe8956958c9ff5b54d2 [2022-11-21 16:30:29,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:30:29,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:30:29,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:30:29,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:30:29,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:30:29,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:30:29" (1/1) ... [2022-11-21 16:30:29,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b692a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:29, skipping insertion in model container [2022-11-21 16:30:29,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:30:29" (1/1) ... [2022-11-21 16:30:29,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:30:29,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:30:29,906 WARN L237 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_ab49700c-3b2d-4395-aec4-ca1677ae34b8/sv-benchmarks/c/array-fpi/s42if.c[588,601] [2022-11-21 16:30:29,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:30:29,955 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:30:29,976 WARN L237 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_ab49700c-3b2d-4395-aec4-ca1677ae34b8/sv-benchmarks/c/array-fpi/s42if.c[588,601] [2022-11-21 16:30:30,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:30:30,022 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:30:30,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30 WrapperNode [2022-11-21 16:30:30,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:30:30,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:30:30,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:30:30,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:30:30,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,077 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2022-11-21 16:30:30,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:30:30,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:30:30,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:30:30,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:30:30,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:30:30,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:30:30,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:30:30,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:30:30,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (1/1) ... [2022-11-21 16:30:30,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:30:30,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:30,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:30:30,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:30:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:30:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:30:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:30:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:30:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:30:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:30:30,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:30:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:30:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:30:30,315 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:30:30,317 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:30:30,505 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:30:30,513 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:30:30,513 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:30:30,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:30:30 BoogieIcfgContainer [2022-11-21 16:30:30,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:30:30,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:30:30,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:30:30,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:30:30,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:30:29" (1/3) ... [2022-11-21 16:30:30,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ded19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:30:30, skipping insertion in model container [2022-11-21 16:30:30,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:30:30" (2/3) ... [2022-11-21 16:30:30,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ded19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:30:30, skipping insertion in model container [2022-11-21 16:30:30,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:30:30" (3/3) ... [2022-11-21 16:30:30,541 INFO L112 eAbstractionObserver]: Analyzing ICFG s42if.c [2022-11-21 16:30:30,577 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:30:30,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:30:30,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:30:30,709 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17f3ecac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:30:30,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:30:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:30:30,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:30,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:30,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:30:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:30,759 INFO L85 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2022-11-21 16:30:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:30,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934301846] [2022-11-21 16:30:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:30,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:30,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934301846] [2022-11-21 16:30:30,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934301846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:30:30,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:30:31,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:30:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069573915] [2022-11-21 16:30:31,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:30:31,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:30:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:30:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:30:31,060 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:31,088 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-11-21 16:30:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:30:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-21 16:30:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:31,104 INFO L225 Difference]: With dead ends: 42 [2022-11-21 16:30:31,105 INFO L226 Difference]: Without dead ends: 19 [2022-11-21 16:30:31,109 INFO L412 NwaCegarLoop]: 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 [2022-11-21 16:30:31,114 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-11-21 16:30:31,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:30:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-21 16:30:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-21 16:30:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2022-11-21 16:30:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-21 16:30:31,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2022-11-21 16:30:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:31,162 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-21 16:30:31,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-21 16:30:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:30:31,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:31,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:30:31,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:30:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2022-11-21 16:30:31,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:31,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838564952] [2022-11-21 16:30:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:31,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:31,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838564952] [2022-11-21 16:30:31,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838564952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:30:31,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:30:31,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:30:31,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589163515] [2022-11-21 16:30:31,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:30:31,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:30:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:30:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:30:31,374 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:31,469 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-21 16:30:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:30:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-21 16:30:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:31,471 INFO L225 Difference]: With dead ends: 39 [2022-11-21 16:30:31,471 INFO L226 Difference]: Without dead ends: 27 [2022-11-21 16:30:31,472 INFO L412 NwaCegarLoop]: 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 [2022-11-21 16:30:31,473 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:31,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 11 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:30:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-21 16:30:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-11-21 16:30:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-21 16:30:31,481 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2022-11-21 16:30:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:31,482 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-21 16:30:31,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-21 16:30:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:30:31,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:31,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:30:31,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:30:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2022-11-21 16:30:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:31,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619969235] [2022-11-21 16:30:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:31,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:32,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:32,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619969235] [2022-11-21 16:30:32,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619969235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:32,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630805367] [2022-11-21 16:30:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:32,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:32,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:32,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:30:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 16:30:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:32,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:30:32,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:30:32,906 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:30:33,077 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:30:33,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-11-21 16:30:33,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-11-21 16:30:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:33,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:33,731 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_45 (Array Int Int))) (let ((.cse0 (select v_ArrVal_45 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse0)) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_45) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse0) .cse1)))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_45 (Array Int Int))) (let ((.cse2 (select v_ArrVal_45 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse2)) (<= .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_45) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse2))))))) is different from false [2022-11-21 16:30:34,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:30:34,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 72 [2022-11-21 16:30:34,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:30:34,058 INFO L350 Elim1Store]: Elim1 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 66 treesize of output 54 [2022-11-21 16:30:34,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-21 16:30:34,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-21 16:30:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-21 16:30:34,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630805367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:34,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:34,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 23 [2022-11-21 16:30:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456414730] [2022-11-21 16:30:34,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:30:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:30:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=372, Unknown=1, NotChecked=40, Total=506 [2022-11-21 16:30:34,160 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-11-21 16:30:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:44,360 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-11-21 16:30:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:30:44,363 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 21 [2022-11-21 16:30:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:44,364 INFO L225 Difference]: With dead ends: 51 [2022-11-21 16:30:44,364 INFO L226 Difference]: Without dead ends: 47 [2022-11-21 16:30:44,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=357, Invalid=1052, Unknown=1, NotChecked=72, Total=1482 [2022-11-21 16:30:44,366 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 156 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 76 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:44,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 44 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 261 Invalid, 5 Unknown, 45 Unchecked, 0.7s Time] [2022-11-21 16:30:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-21 16:30:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-11-21 16:30:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-11-21 16:30:44,384 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 21 [2022-11-21 16:30:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:44,385 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-11-21 16:30:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-11-21 16:30:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-11-21 16:30:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:30:44,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:44,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:44,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 16:30:44,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:44,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:30:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:44,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2022-11-21 16:30:44,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:44,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741489840] [2022-11-21 16:30:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:44,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:44,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:30:44,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288365329] [2022-11-21 16:30:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:44,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:44,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:44,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:44,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:30:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:30:44,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:44,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-21 16:30:44,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 16:30:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:44,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:44,882 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 31 [2022-11-21 16:30:44,893 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-21 16:30:44,894 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 24 [2022-11-21 16:30:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:44,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741489840] [2022-11-21 16:30:44,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:30:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288365329] [2022-11-21 16:30:44,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288365329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:44,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:30:44,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-21 16:30:44,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952004160] [2022-11-21 16:30:44,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:44,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:30:44,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:44,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:30:44,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:30:44,915 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:45,202 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2022-11-21 16:30:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:30:45,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 16:30:45,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:45,205 INFO L225 Difference]: With dead ends: 75 [2022-11-21 16:30:45,205 INFO L226 Difference]: Without dead ends: 63 [2022-11-21 16:30:45,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:30:45,206 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:45,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:30:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-21 16:30:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2022-11-21 16:30:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-11-21 16:30:45,234 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 21 [2022-11-21 16:30:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:45,235 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-11-21 16:30:45,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-11-21 16:30:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:30:45,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:45,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:45,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:45,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:45,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:30:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1592625659, now seen corresponding path program 1 times [2022-11-21 16:30:45,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:45,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918866618] [2022-11-21 16:30:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:45,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:30:45,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609959067] [2022-11-21 16:30:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:45,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:45,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:45,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:30:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:30:45,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:45,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:30:45,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 16:30:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:45,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:45,721 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2022-11-21 16:30:45,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-21 16:30:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:45,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:45,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918866618] [2022-11-21 16:30:45,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:30:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609959067] [2022-11-21 16:30:45,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609959067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:45,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:30:45,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-21 16:30:45,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600676800] [2022-11-21 16:30:45,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:45,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:30:45,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:45,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:30:45,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:30:45,745 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:45,930 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2022-11-21 16:30:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:30:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 16:30:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:45,932 INFO L225 Difference]: With dead ends: 78 [2022-11-21 16:30:45,932 INFO L226 Difference]: Without dead ends: 57 [2022-11-21 16:30:45,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:30:45,934 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:45,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 55 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:30:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-21 16:30:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2022-11-21 16:30:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-11-21 16:30:45,950 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 21 [2022-11-21 16:30:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:45,951 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-11-21 16:30:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-11-21 16:30:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:30:45,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:45,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:45,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:46,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:46,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:30:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2022-11-21 16:30:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:46,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343158347] [2022-11-21 16:30:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:46,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:46,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:46,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343158347] [2022-11-21 16:30:46,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343158347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:46,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799549564] [2022-11-21 16:30:46,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:30:46,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:46,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:46,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:46,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:30:46,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:30:46,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:30:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:30:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:46,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:46,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799549564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:46,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:46,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-21 16:30:46,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738926763] [2022-11-21 16:30:46,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:46,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:30:46,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:30:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:30:46,537 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) [2022-11-21 16:30:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:46,876 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2022-11-21 16:30:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:30:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) Word has length 23 [2022-11-21 16:30:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:46,882 INFO L225 Difference]: With dead ends: 85 [2022-11-21 16:30:46,882 INFO L226 Difference]: Without dead ends: 75 [2022-11-21 16:30:46,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:30:46,884 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:46,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 37 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:30:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-21 16:30:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 53. [2022-11-21 16:30:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 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) [2022-11-21 16:30:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-21 16:30:46,905 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 23 [2022-11-21 16:30:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:46,905 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-21 16:30:46,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) [2022-11-21 16:30:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-21 16:30:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:30:46,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:46,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:46,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:47,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:47,111 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:30:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:47,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2022-11-21 16:30:47,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:47,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921353861] [2022-11-21 16:30:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:47,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:47,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:47,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921353861] [2022-11-21 16:30:47,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921353861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739185982] [2022-11-21 16:30:47,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:30:47,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:47,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:47,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:47,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:30:47,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:30:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:30:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:30:47,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:47,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:30:47,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739185982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:47,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:47,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-21 16:30:47,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057280676] [2022-11-21 16:30:47,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:47,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:30:47,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:47,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:30:47,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:30:47,489 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:30:47,724 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-11-21 16:30:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:30:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-21 16:30:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:30:47,726 INFO L225 Difference]: With dead ends: 78 [2022-11-21 16:30:47,726 INFO L226 Difference]: Without dead ends: 42 [2022-11-21 16:30:47,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:30:47,727 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:30:47,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 28 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:30:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-21 16:30:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-21 16:30:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-11-21 16:30:47,740 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2022-11-21 16:30:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:30:47,741 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-11-21 16:30:47,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-11-21 16:30:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:30:47,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:30:47,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:47,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:30:47,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:30:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2022-11-21 16:30:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:47,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792382469] [2022-11-21 16:30:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:30:48,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:48,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792382469] [2022-11-21 16:30:48,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792382469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:48,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626548780] [2022-11-21 16:30:48,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:30:48,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:48,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:48,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:30:49,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:30:49,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:30:49,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-21 16:30:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:49,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:30:49,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:30:49,121 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:30:49,182 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:30:49,361 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:30:49,451 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:30:49,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-11-21 16:30:49,773 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:30:49,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 41 [2022-11-21 16:30:49,941 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:30:49,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 32 [2022-11-21 16:30:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:49,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:50,735 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_208 (Array Int Int))) (let ((.cse0 (select v_ArrVal_208 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse0)) (forall ((v_subst_1 Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_208))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_1))))) (or (not (= .cse1 5)) (<= .cse2 (+ .cse1 .cse3 .cse0))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_208 (Array Int Int))) (let ((.cse6 (select v_ArrVal_208 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse6)) (forall ((v_subst_2 Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_208))) (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse8 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_2))))) (or (<= (+ .cse7 .cse6 .cse8) .cse2) (not (= 5 .cse8))))))))))))) is different from false [2022-11-21 16:30:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-21 16:30:52,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626548780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:52,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:52,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 36 [2022-11-21 16:30:52,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975653460] [2022-11-21 16:30:52,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:52,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:30:52,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:30:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1050, Unknown=5, NotChecked=66, Total=1260 [2022-11-21 16:30:52,726 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:03,424 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-11-21 16:31:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:31:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-21 16:31:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:03,426 INFO L225 Difference]: With dead ends: 82 [2022-11-21 16:31:03,427 INFO L226 Difference]: Without dead ends: 78 [2022-11-21 16:31:03,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=403, Invalid=2455, Unknown=8, NotChecked=104, Total=2970 [2022-11-21 16:31:03,429 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 116 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:03,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 152 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 720 Invalid, 15 Unknown, 47 Unchecked, 2.0s Time] [2022-11-21 16:31:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-21 16:31:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2022-11-21 16:31:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-11-21 16:31:03,447 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 29 [2022-11-21 16:31:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:03,448 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-11-21 16:31:03,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-11-21 16:31:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:31:03,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:03,449 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:03,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:03,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:03,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:31:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2022-11-21 16:31:03,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:03,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694572383] [2022-11-21 16:31:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:03,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:03,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:31:03,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102996681] [2022-11-21 16:31:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:03,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:03,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:03,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:31:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:31:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:03,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 16:31:03,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:31:03,997 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-21 16:31:04,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 16:31:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:31:04,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:04,110 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_253 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_253) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) is different from false [2022-11-21 16:31:04,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:31:04,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 31 [2022-11-21 16:31:04,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:31:04,263 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 34 [2022-11-21 16:31:04,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-21 16:31:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2022-11-21 16:31:04,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:04,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694572383] [2022-11-21 16:31:04,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:31:04,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102996681] [2022-11-21 16:31:04,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102996681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:04,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:31:04,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-21 16:31:04,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614555758] [2022-11-21 16:31:04,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:04,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:31:04,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:04,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:31:04,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=241, Unknown=5, NotChecked=32, Total=342 [2022-11-21 16:31:04,381 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:05,015 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-11-21 16:31:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:31:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-21 16:31:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:05,016 INFO L225 Difference]: With dead ends: 114 [2022-11-21 16:31:05,017 INFO L226 Difference]: Without dead ends: 107 [2022-11-21 16:31:05,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=359, Unknown=5, NotChecked=40, Total=506 [2022-11-21 16:31:05,018 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 97 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:05,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 97 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 352 Invalid, 0 Unknown, 53 Unchecked, 0.5s Time] [2022-11-21 16:31:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-21 16:31:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2022-11-21 16:31:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 70 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-11-21 16:31:05,056 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 29 [2022-11-21 16:31:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:05,058 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-11-21 16:31:05,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-11-21 16:31:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:31:05,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:05,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:05,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:05,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:05,274 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:31:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash -968292246, now seen corresponding path program 1 times [2022-11-21 16:31:05,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:05,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918623485] [2022-11-21 16:31:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:05,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:05,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:31:05,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260967214] [2022-11-21 16:31:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:05,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:05,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:05,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:05,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:31:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:31:05,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:05,458 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-21 16:31:05,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:31:05,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 16:31:05,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 16:31:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:31:05,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:05,663 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-21 16:31:05,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-21 16:31:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:31:05,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:05,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918623485] [2022-11-21 16:31:05,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:31:05,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260967214] [2022-11-21 16:31:05,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260967214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:05,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:31:05,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-21 16:31:05,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092580893] [2022-11-21 16:31:05,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:05,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:31:05,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:31:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:31:05,709 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:05,992 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2022-11-21 16:31:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:31:05,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-21 16:31:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:05,993 INFO L225 Difference]: With dead ends: 115 [2022-11-21 16:31:05,993 INFO L226 Difference]: Without dead ends: 84 [2022-11-21 16:31:05,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:31:05,994 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:05,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 72 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:31:05,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-21 16:31:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2022-11-21 16:31:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2022-11-21 16:31:06,026 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 29 [2022-11-21 16:31:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:06,026 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2022-11-21 16:31:06,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2022-11-21 16:31:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:31:06,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:06,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:06,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:06,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:31:06,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:31:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash -554569936, now seen corresponding path program 5 times [2022-11-21 16:31:06,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:06,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542713046] [2022-11-21 16:31:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:31:06,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:06,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542713046] [2022-11-21 16:31:06,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542713046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206257823] [2022-11-21 16:31:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:31:06,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:06,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:06,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:06,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:31:06,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 16:31:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:31:06,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:31:06,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:31:06,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206257823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:06,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-21 16:31:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621027183] [2022-11-21 16:31:06,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:31:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:31:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:31:06,751 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:07,147 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2022-11-21 16:31:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:31:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 31 [2022-11-21 16:31:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:07,148 INFO L225 Difference]: With dead ends: 121 [2022-11-21 16:31:07,148 INFO L226 Difference]: Without dead ends: 108 [2022-11-21 16:31:07,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:31:07,150 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:07,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 30 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:31:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-21 16:31:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2022-11-21 16:31:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-11-21 16:31:07,173 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 31 [2022-11-21 16:31:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:07,173 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-11-21 16:31:07,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-11-21 16:31:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 16:31:07,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:07,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:07,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:07,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:07,382 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:31:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1053387787, now seen corresponding path program 6 times [2022-11-21 16:31:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:07,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141128583] [2022-11-21 16:31:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:31:07,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:07,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141128583] [2022-11-21 16:31:07,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141128583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:07,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19120764] [2022-11-21 16:31:07,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:31:07,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:07,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:07,531 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:07,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:31:07,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-21 16:31:07,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:07,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:31:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:31:07,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:31:07,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19120764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:07,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:07,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-21 16:31:07,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761284646] [2022-11-21 16:31:07,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:07,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:31:07,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:07,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:31:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:31:07,896 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:08,148 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2022-11-21 16:31:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:31:08,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-21 16:31:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:08,150 INFO L225 Difference]: With dead ends: 109 [2022-11-21 16:31:08,150 INFO L226 Difference]: Without dead ends: 53 [2022-11-21 16:31:08,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:31:08,151 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:08,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 28 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:31:08,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-21 16:31:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-11-21 16:31:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-21 16:31:08,165 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2022-11-21 16:31:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:08,165 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-21 16:31:08,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-21 16:31:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 16:31:08,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:08,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:08,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:08,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:08,373 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:31:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1383779305, now seen corresponding path program 7 times [2022-11-21 16:31:08,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:08,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915458863] [2022-11-21 16:31:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:31:09,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915458863] [2022-11-21 16:31:09,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915458863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999006055] [2022-11-21 16:31:09,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:31:09,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:09,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:09,719 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:09,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:31:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:09,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-21 16:31:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:09,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:31:09,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:31:10,040 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:31:10,130 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:31:10,211 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:31:10,418 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:31:10,456 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:31:10,497 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:31:10,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-11-21 16:31:10,824 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:31:10,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-21 16:31:11,057 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:31:11,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-21 16:31:11,242 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:31:11,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 32 [2022-11-21 16:31:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:31:11,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:13,014 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_438 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse0 (select v_ArrVal_438 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse0 5)) (forall ((v_subst_6 Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_438))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse4 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_6))))) (or (not (= .cse1 5)) (forall ((v_subst_4 Int)) (let ((.cse2 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse0 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_4))))) (or (not (= 5 .cse2)) (<= .cse3 (+ .cse1 .cse0 .cse2 .cse4)))))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_438 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse7 (select v_ArrVal_438 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse7 5)) (forall ((v_subst_5 Int)) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_438))) (let ((.cse12 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse10 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse8 (select (select (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_5))))) (or (not (= 5 .cse8)) (forall ((v_subst_3 Int)) (let ((.cse9 (select (select (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse8 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_3))))) (or (<= (+ .cse7 .cse9 .cse8 .cse10) .cse3) (not (= 5 .cse9)))))))))))))))) is different from false [2022-11-21 16:31:19,663 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-21 16:31:19,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 835 treesize of output 1 [2022-11-21 16:31:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 5 not checked. [2022-11-21 16:31:19,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999006055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:19,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:19,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 44 [2022-11-21 16:31:19,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649587840] [2022-11-21 16:31:19,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:19,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-21 16:31:19,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-21 16:31:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1637, Unknown=1, NotChecked=82, Total=1892 [2022-11-21 16:31:19,670 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:39,114 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 88 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:31:40,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:31:46,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-21 16:31:55,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:31:55,625 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse5 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_438 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse2 (select v_ArrVal_438 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse2 5)) (forall ((v_subst_6 Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_438))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse6 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_6))))) (or (not (= .cse3 5)) (forall ((v_subst_4 Int)) (let ((.cse4 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse2 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_4))))) (or (not (= 5 .cse4)) (<= .cse5 (+ .cse3 .cse2 .cse4 .cse6)))))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_438 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse9 (select v_ArrVal_438 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse9 5)) (forall ((v_subst_5 Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_438))) (let ((.cse14 (select .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse12 (select .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse10 (select (select (store .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_5))))) (or (not (= 5 .cse10)) (forall ((v_subst_3 Int)) (let ((.cse11 (select (select (store .cse13 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 .cse10 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_3))))) (or (<= (+ .cse9 .cse11 .cse10 .cse12) .cse5) (not (= 5 .cse11)))))))))))))))))) (and (or .cse0 (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0))) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= 3 c_~N~0) (let ((.cse1 (<= (mod c_~N~0 4294967296) 536870911))) (or (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse1) (and (not .cse1) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 0)))) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (= 5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (<= c_~N~0 3) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 5) (or .cse0 (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0)))) is different from false [2022-11-21 16:32:02,952 WARN L233 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 108 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:32:34,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-21 16:32:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:32:36,702 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2022-11-21 16:32:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-21 16:32:36,703 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-21 16:32:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:32:36,704 INFO L225 Difference]: With dead ends: 153 [2022-11-21 16:32:36,704 INFO L226 Difference]: Without dead ends: 145 [2022-11-21 16:32:36,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 70.9s TimeCoverageRelationStatistics Valid=1135, Invalid=8761, Unknown=12, NotChecked=394, Total=10302 [2022-11-21 16:32:36,707 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 268 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 246 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:32:36,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 218 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1261 Invalid, 30 Unknown, 85 Unchecked, 13.9s Time] [2022-11-21 16:32:36,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-21 16:32:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 97. [2022-11-21 16:32:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 96 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) [2022-11-21 16:32:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2022-11-21 16:32:36,737 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 37 [2022-11-21 16:32:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:32:36,737 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2022-11-21 16:32:36,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2022-11-21 16:32:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 16:32:36,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:32:36,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:32:36,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:32:36,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:32:36,945 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:32:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:32:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1441037607, now seen corresponding path program 2 times [2022-11-21 16:32:36,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:32:36,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606860561] [2022-11-21 16:32:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:32:36,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:32:36,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:32:36,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196209790] [2022-11-21 16:32:36,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:32:36,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:32:36,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:32:36,963 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:32:36,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:32:37,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:32:37,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:32:37,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:32:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:32:37,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 16:32:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:32:37,563 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-21 16:32:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:32:37,648 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-21 16:32:37,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:32:37,784 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-21 16:32:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:32:37,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:32:52,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:32:52,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 33 [2022-11-21 16:32:52,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:32:52,651 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 38 [2022-11-21 16:32:52,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-21 16:32:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:32:53,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:32:53,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606860561] [2022-11-21 16:32:53,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:32:53,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196209790] [2022-11-21 16:32:53,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196209790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:32:53,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:32:53,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-11-21 16:32:53,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692205755] [2022-11-21 16:32:53,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:32:53,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 16:32:53,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:32:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 16:32:53,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=910, Unknown=12, NotChecked=0, Total=1122 [2022-11-21 16:32:53,407 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:57,129 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_146| Int) (v_ArrVal_498 (Array Int Int))) (or (< 2 |v_ULTIMATE.start_main_~i~0#1_146|) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_498) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_146| 4)))) (< (+ |v_ULTIMATE.start_main_~i~0#1_146| 1) c_~N~0))) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (<= 3 c_~N~0) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_146| Int) (v_ArrVal_498 (Array Int Int))) (or (< 2 |v_ULTIMATE.start_main_~i~0#1_146|) (< (+ |v_ULTIMATE.start_main_~i~0#1_146| 1) c_~N~0) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 4)))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_498) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_146| 4)))))) (not (= |c_ULTIMATE.start_main_#t~mem8#1| 1)))) is different from false [2022-11-21 16:33:03,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:33:34,292 WARN L233 SmtUtils]: Spent 8.75s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:33:36,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:33:48,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-21 16:33:50,802 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_146| Int) (v_ArrVal_498 (Array Int Int))) (or (< 2 |v_ULTIMATE.start_main_~i~0#1_146|) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_498) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_146| 4)))) (< (+ |v_ULTIMATE.start_main_~i~0#1_146| 1) c_~N~0))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) is different from false [2022-11-21 16:33:52,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:34:02,026 WARN L233 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 35 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:34:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:11,533 INFO L93 Difference]: Finished difference Result 300 states and 393 transitions. [2022-11-21 16:34:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-21 16:34:11,534 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-21 16:34:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:11,536 INFO L225 Difference]: With dead ends: 300 [2022-11-21 16:34:11,537 INFO L226 Difference]: Without dead ends: 293 [2022-11-21 16:34:11,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 83.1s TimeCoverageRelationStatistics Valid=670, Invalid=2728, Unknown=32, NotChecked=230, Total=3660 [2022-11-21 16:34:11,539 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 419 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 138 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:11,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 114 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 933 Invalid, 21 Unknown, 3 Unchecked, 10.2s Time] [2022-11-21 16:34:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-21 16:34:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 165. [2022-11-21 16:34:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3109756097560976) internal successors, (215), 164 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 215 transitions. [2022-11-21 16:34:11,603 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 215 transitions. Word has length 37 [2022-11-21 16:34:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:11,603 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 215 transitions. [2022-11-21 16:34:11,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 215 transitions. [2022-11-21 16:34:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 16:34:11,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:11,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:11,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:34:11,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:34:11,812 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:34:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash -147310295, now seen corresponding path program 2 times [2022-11-21 16:34:11,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:11,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613585055] [2022-11-21 16:34:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:11,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:11,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:34:11,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032356828] [2022-11-21 16:34:11,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:34:11,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:34:11,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:34:11,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:34:11,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:34:11,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:34:11,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:11,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 16:34:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:12,113 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-21 16:34:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:34:12,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 16:34:12,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:34:12,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 16:34:12,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 16:34:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:34:12,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:12,563 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-21 16:34:12,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-21 16:34:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:34:12,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613585055] [2022-11-21 16:34:12,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:34:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032356828] [2022-11-21 16:34:12,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032356828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:12,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:12,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-21 16:34:12,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462197943] [2022-11-21 16:34:12,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:12,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:34:12,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:34:12,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:34:12,673 INFO L87 Difference]: Start difference. First operand 165 states and 215 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2022-11-21 16:34:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:13,496 INFO L93 Difference]: Finished difference Result 259 states and 345 transitions. [2022-11-21 16:34:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:34:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 37 [2022-11-21 16:34:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:13,499 INFO L225 Difference]: With dead ends: 259 [2022-11-21 16:34:13,499 INFO L226 Difference]: Without dead ends: 185 [2022-11-21 16:34:13,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:34:13,500 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:13,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 88 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:34:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-21 16:34:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2022-11-21 16:34:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.298780487804878) internal successors, (213), 164 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 213 transitions. [2022-11-21 16:34:13,563 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 213 transitions. Word has length 37 [2022-11-21 16:34:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:13,564 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 213 transitions. [2022-11-21 16:34:13,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2022-11-21 16:34:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 213 transitions. [2022-11-21 16:34:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 16:34:13,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:13,565 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:13,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:34:13,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:34:13,772 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:34:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1016239403, now seen corresponding path program 8 times [2022-11-21 16:34:13,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:13,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501126967] [2022-11-21 16:34:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:13,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:34:14,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:14,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501126967] [2022-11-21 16:34:14,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501126967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:34:14,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693243882] [2022-11-21 16:34:14,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:34:14,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:34:14,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:34:14,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:34:14,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:34:14,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:34:14,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:14,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:34:14,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:34:14,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:34:14,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693243882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:14,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:34:14,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-21 16:34:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805159784] [2022-11-21 16:34:14,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:14,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:34:14,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:14,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:34:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:34:14,708 INFO L87 Difference]: Start difference. First operand 165 states and 213 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:15,652 INFO L93 Difference]: Finished difference Result 208 states and 269 transitions. [2022-11-21 16:34:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:34:15,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-21 16:34:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:15,654 INFO L225 Difference]: With dead ends: 208 [2022-11-21 16:34:15,654 INFO L226 Difference]: Without dead ends: 192 [2022-11-21 16:34:15,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:34:15,656 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:15,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 40 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:34:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-21 16:34:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 109. [2022-11-21 16:34:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.25) internal successors, (135), 108 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-11-21 16:34:15,696 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 39 [2022-11-21 16:34:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:15,696 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-11-21 16:34:15,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-11-21 16:34:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:34:15,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:15,697 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:15,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-21 16:34:15,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:34:15,903 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:34:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1682760144, now seen corresponding path program 9 times [2022-11-21 16:34:15,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:15,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753273545] [2022-11-21 16:34:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:15,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:34:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:16,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753273545] [2022-11-21 16:34:16,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753273545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:34:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512576069] [2022-11-21 16:34:16,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:34:16,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:34:16,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:34:16,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:34:16,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:34:16,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:34:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:16,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:34:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:34:16,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:34:16,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512576069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:16,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:34:16,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-21 16:34:16,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67391532] [2022-11-21 16:34:16,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:16,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:34:16,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:34:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:34:16,964 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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) [2022-11-21 16:34:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:17,561 INFO L93 Difference]: Finished difference Result 138 states and 169 transitions. [2022-11-21 16:34:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:34:17,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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) Word has length 40 [2022-11-21 16:34:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:17,562 INFO L225 Difference]: With dead ends: 138 [2022-11-21 16:34:17,562 INFO L226 Difference]: Without dead ends: 61 [2022-11-21 16:34:17,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:34:17,564 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 97 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:17,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 22 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:34:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-21 16:34:17,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2022-11-21 16:34:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-21 16:34:17,590 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 40 [2022-11-21 16:34:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:17,590 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-21 16:34:17,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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) [2022-11-21 16:34:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-21 16:34:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:34:17,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:17,592 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:17,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:34:17,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:34:17,805 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:34:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2111860654, now seen corresponding path program 10 times [2022-11-21 16:34:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:17,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70257772] [2022-11-21 16:34:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:17,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:34:20,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70257772] [2022-11-21 16:34:20,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70257772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:34:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881057276] [2022-11-21 16:34:20,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:34:20,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:34:20,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:34:20,363 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:34:20,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 16:34:20,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:34:20,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-21 16:34:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:20,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:34:20,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:34:20,848 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:34:20,985 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:34:21,115 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:34:21,239 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:34:21,503 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:34:21,683 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:34:21,859 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:34:22,022 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:34:22,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-11-21 16:34:22,517 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:34:22,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-21 16:34:22,866 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:34:22,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2022-11-21 16:34:23,310 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:34:23,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2022-11-21 16:34:23,585 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:34:23,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 32 [2022-11-21 16:34:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:23,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:16,149 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-21 16:35:16,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1833 treesize of output 1 [2022-11-21 16:35:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:16,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881057276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:16,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:16,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 23] total 62 [2022-11-21 16:35:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972606083] [2022-11-21 16:35:16,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-21 16:35:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-21 16:35:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=3423, Unknown=7, NotChecked=0, Total=3782 [2022-11-21 16:35:16,159 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 62 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 62 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:26,182 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 135 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:36:01,641 WARN L233 SmtUtils]: Spent 19.00s on a formula simplification. DAG size of input: 194 DAG size of output: 173 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:36:08,189 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 201 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:36:10,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:36:12,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:36:17,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:36:44,572 WARN L233 SmtUtils]: Spent 11.55s on a formula simplification. DAG size of input: 182 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:36:57,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:36:59,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-21 16:37:06,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:37:08,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:37:10,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:37:29,254 WARN L233 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 186 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:37:34,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-11-21 16:37:44,612 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 197 DAG size of output: 176 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:37:49,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:37:51,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:37:53,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:37:55,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:37:56,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:38:21,463 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 181 DAG size of output: 175 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:38:33,007 WARN L233 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 133 DAG size of output: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:38:45,069 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 114 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:38:48,284 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse15 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse4 (select .cse15 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (.cse6 (* c_~N~0 5))) (let ((.cse0 (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_736 (Array Int Int))) (let ((.cse27 (select v_ArrVal_736 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse27)) (forall ((v_subst_11 Int)) (let ((.cse32 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_736))) (let ((.cse33 (select .cse32 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse31 (select .cse33 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse28 (select (select (store .cse32 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse33 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse31 .cse27))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_11 4))))) (or (not (= .cse28 5)) (forall ((v_subst_10 Int)) (let ((.cse30 (select (select (store .cse32 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse33 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse31 .cse28 .cse27))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_10 4))))) (or (forall ((v_subst_7 Int)) (let ((.cse29 (select (select (store .cse32 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse33 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse30 .cse31 .cse28 .cse27))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_7))))) (or (not (= 5 .cse29)) (<= (+ .cse30 .cse31 .cse28 .cse29 .cse27) .cse6)))) (not (= .cse30 5)))))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_736 (Array Int Int))) (let ((.cse38 (select v_ArrVal_736 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (forall ((v_subst_12 Int)) (let ((.cse39 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_736))) (let ((.cse40 (select .cse39 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse37 (select .cse40 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse34 (select (select (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse37 .cse38))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_12 4))))) (or (not (= .cse34 5)) (forall ((v_subst_9 Int)) (let ((.cse35 (select (select (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse37 .cse34 .cse38))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_9))))) (or (not (= 5 .cse35)) (forall ((v_subst_8 Int)) (let ((.cse36 (select (select (store .cse39 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse40 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse37 .cse34 .cse35 .cse38))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_8))))) (or (<= .cse6 (+ .cse36 .cse37 .cse34 .cse35 .cse38)) (not (= .cse36 5)))))))))))))) (not (= 5 .cse38))))))) (.cse13 (not (= 5 |c_ULTIMATE.start_main_#t~mem12#1|))) (.cse24 (let ((.cse26 (+ .cse2 5 .cse4))) (and (<= .cse26 .cse6) (<= .cse6 .cse26)))) (.cse25 (not (= 5 .cse4))) (.cse12 (+ .cse2 .cse4))) (and (or .cse0 (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (or (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse12)) |c_ULTIMATE.start_main_~a~0#1.base|))) (and (forall ((v_subst_11 Int)) (let ((.cse1 (select .cse8 (+ (* v_subst_11 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or (not (= 5 .cse1)) (forall ((v_subst_10 Int)) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse1 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* v_subst_10 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or (forall ((v_subst_7 Int)) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse1 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 4 v_subst_7) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or (<= (+ .cse2 .cse3 .cse1 .cse4 .cse5) .cse6) (not (= 5 .cse5))))) (not (= 5 .cse3)))))))) (forall ((v_subst_12 Int)) (let ((.cse9 (select .cse8 (+ (* v_subst_12 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or (forall ((v_subst_9 Int)) (let ((.cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 .cse2 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 4 v_subst_9) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or (forall ((v_subst_8 Int)) (let ((.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 .cse2 .cse11 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 4 v_subst_8) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or (<= .cse6 (+ .cse9 .cse2 .cse10 .cse11 .cse4)) (not (= .cse10 5))))) (not (= .cse11 5))))) (not (= .cse9 5))))))) .cse13) (<= c_~N~0 4) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse4 |c_ULTIMATE.start_main_#t~mem12#1|) (let ((.cse14 (<= (mod c_~N~0 4294967296) 536870911))) (or (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse14) (and (not .cse14) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 0)))) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (= 5 (select .cse15 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or .cse0 (< 4 c_~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0))) (or (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse16 (select .cse15 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse16 5)) (forall ((v_subst_11 Int)) (let ((.cse17 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_11 4))))) (or (not (= 5 .cse17)) (forall ((v_subst_10 Int)) (let ((.cse18 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse16 .cse17))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_10 4))))) (or (forall ((v_subst_7 Int)) (let ((.cse19 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse16 .cse18 .cse17))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_7))))) (or (<= (+ .cse2 .cse16 .cse18 .cse19 .cse17) .cse6) (not (= 5 .cse19))))) (not (= .cse18 5))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse20 (select .cse15 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse20 5)) (forall ((v_subst_12 Int)) (let ((.cse23 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse20))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_12 4))))) (or (forall ((v_subst_9 Int)) (let ((.cse22 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse20 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_9))))) (or (forall ((v_subst_8 Int)) (let ((.cse21 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse20 .cse22 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_8))))) (or (not (= .cse21 5)) (<= .cse6 (+ .cse2 .cse20 .cse21 .cse22 .cse23))))) (not (= .cse22 5))))) (not (= 5 .cse23)))))))))) (= .cse2 5) (or .cse24 .cse13) (<= 4 c_~N~0) (or .cse25 .cse24) (or .cse25 (and (<= .cse6 .cse12) (<= .cse12 .cse6))))))) is different from false [2022-11-21 16:38:50,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:38:52,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-21 16:38:54,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-21 16:39:15,500 WARN L233 SmtUtils]: Spent 14.76s on a formula simplification. DAG size of input: 184 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:39:26,206 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 135 DAG size of output: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:39:28,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-21 16:39:31,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-11-21 16:39:34,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:39:50,380 WARN L233 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 182 DAG size of output: 176 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:39:52,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:39:54,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-21 16:39:57,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:39:59,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:40:01,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:40:11,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:40:14,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:40:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:40:15,130 INFO L93 Difference]: Finished difference Result 183 states and 228 transitions. [2022-11-21 16:40:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-21 16:40:15,131 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 62 states have internal predecessors, (115), 0 states have call successors, (0), 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 45 [2022-11-21 16:40:15,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:40:15,132 INFO L225 Difference]: With dead ends: 183 [2022-11-21 16:40:15,132 INFO L226 Difference]: Without dead ends: 174 [2022-11-21 16:40:15,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 271.9s TimeCoverageRelationStatistics Valid=1860, Invalid=14609, Unknown=47, NotChecked=254, Total=16770 [2022-11-21 16:40:15,136 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 385 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 466 mSolverCounterUnsat, 68 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 68 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 78.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:40:15,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 180 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2396 Invalid, 68 Unknown, 2 Unchecked, 78.7s Time] [2022-11-21 16:40:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-21 16:40:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2022-11-21 16:40:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.2601626016260163) internal successors, (155), 123 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-11-21 16:40:15,183 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 45 [2022-11-21 16:40:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:40:15,183 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-11-21 16:40:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 62 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-11-21 16:40:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:40:15,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:40:15,184 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:40:15,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 16:40:15,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:40:15,389 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:40:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:40:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2054602352, now seen corresponding path program 3 times [2022-11-21 16:40:15,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:40:15,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101090318] [2022-11-21 16:40:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:40:15,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:40:15,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:40:15,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800614364] [2022-11-21 16:40:15,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:40:15,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:40:15,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:40:15,407 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:40:15,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 16:40:15,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:40:15,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:40:15,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:40:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:40:15,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-11-21 16:40:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:40:16,285 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-21 16:40:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:40:16,414 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-21 16:40:16,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:40:16,542 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-11-21 16:40:16,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:40:16,696 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2022-11-21 16:40:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-21 16:40:16,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:40:20,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:40:20,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 33 [2022-11-21 16:40:20,437 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-21 16:40:20,437 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 30 [2022-11-21 16:40:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-21 16:40:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:40:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101090318] [2022-11-21 16:40:22,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:40:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800614364] [2022-11-21 16:40:22,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800614364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:40:22,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:40:22,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-11-21 16:40:22,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701671080] [2022-11-21 16:40:22,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:40:22,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:40:22,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:40:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:40:22,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=231, Unknown=3, NotChecked=0, Total=306 [2022-11-21 16:40:22,667 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:40:24,736 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2022-11-21 16:40:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:40:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-21 16:40:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:40:24,738 INFO L225 Difference]: With dead ends: 199 [2022-11-21 16:40:24,738 INFO L226 Difference]: Without dead ends: 195 [2022-11-21 16:40:24,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=177, Invalid=470, Unknown=3, NotChecked=0, Total=650 [2022-11-21 16:40:24,739 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:40:24,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 45 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 16:40:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-21 16:40:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2022-11-21 16:40:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.2914285714285714) internal successors, (226), 175 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2022-11-21 16:40:24,809 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 45 [2022-11-21 16:40:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:40:24,810 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2022-11-21 16:40:24,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2022-11-21 16:40:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:40:24,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:40:24,810 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:40:24,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 16:40:25,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:40:25,011 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:40:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:40:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1431802284, now seen corresponding path program 4 times [2022-11-21 16:40:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:40:25,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393431955] [2022-11-21 16:40:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:40:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:40:25,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:40:25,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323272315] [2022-11-21 16:40:25,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:40:25,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:40:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:40:25,028 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:40:25,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 16:40:25,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:40:25,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:40:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:40:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:40:25,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:40:25,655 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 17 [2022-11-21 16:40:25,901 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-21 16:40:25,902 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 16:40:26,172 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-21 16:40:26,318 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-21 16:40:26,486 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 7 [2022-11-21 16:40:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:40:26,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:40:26,925 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-21 16:40:26,967 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-21 16:40:29,204 INFO L321 Elim1Store]: treesize reduction 29, result has 48.2 percent of original size [2022-11-21 16:40:29,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 43 [2022-11-21 16:40:29,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:40:29,239 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 34 [2022-11-21 16:40:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 15 refuted. 2 times theorem prover too weak. 18 trivial. 12 not checked. [2022-11-21 16:40:29,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:40:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393431955] [2022-11-21 16:40:29,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:40:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323272315] [2022-11-21 16:40:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323272315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:40:29,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:40:29,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2022-11-21 16:40:29,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62824421] [2022-11-21 16:40:29,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:40:29,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:40:29,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:40:29,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:40:29,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=341, Unknown=7, NotChecked=78, Total=506 [2022-11-21 16:40:29,522 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:40:31,488 INFO L93 Difference]: Finished difference Result 195 states and 249 transitions. [2022-11-21 16:40:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:40:31,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-21 16:40:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:40:31,490 INFO L225 Difference]: With dead ends: 195 [2022-11-21 16:40:31,490 INFO L226 Difference]: Without dead ends: 167 [2022-11-21 16:40:31,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=96, Invalid=411, Unknown=7, NotChecked=86, Total=600 [2022-11-21 16:40:31,491 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:40:31,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 59 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 364 Invalid, 0 Unknown, 86 Unchecked, 1.6s Time] [2022-11-21 16:40:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-21 16:40:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-11-21 16:40:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2378048780487805) internal successors, (203), 164 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 203 transitions. [2022-11-21 16:40:31,579 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 203 transitions. Word has length 45 [2022-11-21 16:40:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:40:31,579 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 203 transitions. [2022-11-21 16:40:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 203 transitions. [2022-11-21 16:40:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:40:31,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:40:31,580 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:40:31,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 16:40:31,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:40:31,787 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:40:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:40:31,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1422716494, now seen corresponding path program 3 times [2022-11-21 16:40:31,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:40:31,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424196592] [2022-11-21 16:40:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:40:31,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:40:31,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:40:31,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329912813] [2022-11-21 16:40:31,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:40:31,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:40:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:40:31,806 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:40:31,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 16:40:32,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:40:32,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:40:32,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:40:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:40:32,278 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:40:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:40:32,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-21 16:40:33,185 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-21 16:40:33,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-21 16:40:33,600 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-21 16:40:33,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 47 [2022-11-21 16:40:34,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:40:34,059 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 32 [2022-11-21 16:40:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:40:35,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:41:02,975 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 23 [2022-11-21 16:41:02,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2022-11-21 16:41:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:41:03,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:03,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424196592] [2022-11-21 16:41:03,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:41:03,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329912813] [2022-11-21 16:41:03,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329912813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:41:03,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:41:03,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2022-11-21 16:41:03,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140120520] [2022-11-21 16:41:03,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:41:03,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:41:03,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:41:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:41:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=979, Unknown=5, NotChecked=0, Total=1260 [2022-11-21 16:41:03,009 INFO L87 Difference]: Start difference. First operand 165 states and 203 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:41:14,006 INFO L93 Difference]: Finished difference Result 169 states and 206 transitions. [2022-11-21 16:41:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 16:41:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 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 45 [2022-11-21 16:41:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:41:14,009 INFO L225 Difference]: With dead ends: 169 [2022-11-21 16:41:14,009 INFO L226 Difference]: Without dead ends: 120 [2022-11-21 16:41:14,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=759, Invalid=2658, Unknown=5, NotChecked=0, Total=3422 [2022-11-21 16:41:14,011 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 158 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:41:14,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 42 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 16:41:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-21 16:41:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-11-21 16:41:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.205128205128205) internal successors, (141), 117 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) [2022-11-21 16:41:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2022-11-21 16:41:14,063 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 45 [2022-11-21 16:41:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:41:14,063 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2022-11-21 16:41:14,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2022-11-21 16:41:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:41:14,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:14,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:41:14,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 16:41:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:41:14,264 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:41:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash -220752601, now seen corresponding path program 11 times [2022-11-21 16:41:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:41:14,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677007161] [2022-11-21 16:41:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:41:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 16:41:14,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:14,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677007161] [2022-11-21 16:41:14,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677007161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:41:14,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110528536] [2022-11-21 16:41:14,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:41:14,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:41:14,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:41:14,993 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:41:15,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 16:41:15,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-21 16:41:15,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:41:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:41:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:41:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 16:41:16,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:41:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 16:41:16,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110528536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:41:16,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:41:16,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-21 16:41:16,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833734410] [2022-11-21 16:41:16,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:41:16,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:41:16,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:41:16,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:41:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:41:16,813 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:41:18,188 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2022-11-21 16:41:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:41:18,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 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 48 [2022-11-21 16:41:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:41:18,190 INFO L225 Difference]: With dead ends: 172 [2022-11-21 16:41:18,191 INFO L226 Difference]: Without dead ends: 84 [2022-11-21 16:41:18,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:41:18,192 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:41:18,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 36 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 16:41:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-21 16:41:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2022-11-21 16:41:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 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) [2022-11-21 16:41:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-11-21 16:41:18,216 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 48 [2022-11-21 16:41:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:41:18,216 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-11-21 16:41:18,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-11-21 16:41:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:41:18,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:18,217 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:41:18,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-21 16:41:18,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 16:41:18,418 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:41:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash 730479788, now seen corresponding path program 12 times [2022-11-21 16:41:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:41:18,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721410588] [2022-11-21 16:41:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:41:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-21 16:41:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721410588] [2022-11-21 16:41:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721410588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:41:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626396475] [2022-11-21 16:41:19,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:41:19,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:41:19,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:41:19,216 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:41:19,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 16:41:19,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-21 16:41:19,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:41:19,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:41:19,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:41:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-21 16:41:20,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:41:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-21 16:41:20,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626396475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:41:20,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:41:20,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-21 16:41:20,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781933994] [2022-11-21 16:41:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:41:20,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:41:20,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:41:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:41:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:41:20,939 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:41:23,085 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-21 16:41:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:41:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-21 16:41:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:41:23,086 INFO L225 Difference]: With dead ends: 83 [2022-11-21 16:41:23,086 INFO L226 Difference]: Without dead ends: 79 [2022-11-21 16:41:23,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:41:23,087 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 116 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:41:23,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 41 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 16:41:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-21 16:41:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2022-11-21 16:41:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-11-21 16:41:23,112 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 50 [2022-11-21 16:41:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:41:23,112 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-11-21 16:41:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-11-21 16:41:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:41:23,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:23,114 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:41:23,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-21 16:41:23,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-21 16:41:23,320 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:41:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash 663114381, now seen corresponding path program 13 times [2022-11-21 16:41:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:41:23,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515113916] [2022-11-21 16:41:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:23,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:41:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-21 16:41:28,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:28,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515113916] [2022-11-21 16:41:28,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515113916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:41:28,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110393696] [2022-11-21 16:41:28,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:41:28,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:41:28,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:41:28,602 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:41:28,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab49700c-3b2d-4395-aec4-ca1677ae34b8/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 16:41:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:28,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-21 16:41:28,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:41:29,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:41:29,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:41:29,705 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:30,051 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:30,394 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:30,757 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:31,086 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:31,949 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:32,066 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:32,169 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:32,300 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:32,411 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-21 16:41:32,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-11-21 16:41:33,654 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:41:33,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 41 [2022-11-21 16:41:34,446 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:41:34,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-21 16:41:35,263 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:41:35,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-21 16:41:36,175 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:41:36,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-11-21 16:41:36,732 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 16:41:36,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2022-11-21 16:41:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-21 16:41:37,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:42:07,623 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_1174 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1174 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse0)) (forall ((v_subst_20 Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1174))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse5 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_20 4))))) (or (forall ((v_subst_17 Int)) (let ((.cse4 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse0 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_17 4))))) (or (forall ((v_subst_15 Int)) (let ((.cse3 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse4 .cse0 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_15 4))))) (or (forall ((v_subst_13 Int)) (let ((.cse1 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse0 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* v_subst_13 4) |ULTIMATE.start_main_~a~0#1.offset|)))) (or (not (= .cse1 5)) (<= (+ .cse1 .cse2 .cse3 .cse4 .cse0 .cse5) .cse6)))) (not (= 5 .cse3))))) (not (= 5 .cse4))))) (not (= 5 .cse5))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_1174 (Array Int Int))) (let ((.cse9 (select v_ArrVal_1174 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse9)) (forall ((v_subst_19 Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1174))) (let ((.cse16 (select .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse13 (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse14 (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_19 4))))) (or (forall ((v_subst_18 Int)) (let ((.cse10 (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse9 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_18 4))))) (or (not (= 5 .cse10)) (forall ((v_subst_16 Int)) (let ((.cse12 (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse9 .cse14 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_16 4))))) (or (forall ((v_subst_14 Int)) (let ((.cse11 (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse12 .cse13 .cse9 .cse14 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_14 4))))) (or (not (= 5 .cse11)) (<= .cse6 (+ .cse12 .cse13 .cse11 .cse9 .cse14 .cse10))))) (not (= .cse12 5)))))))) (not (= 5 .cse14))))))))))))) is different from false [2022-11-21 16:42:53,956 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-21 16:42:53,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 3823 treesize of output 1 [2022-11-21 16:42:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 26 trivial. 9 not checked. [2022-11-21 16:42:53,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110393696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:42:53,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:42:53,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 22] total 64 [2022-11-21 16:42:53,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785882039] [2022-11-21 16:42:53,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:42:53,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-21 16:42:53,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:42:53,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-21 16:42:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3647, Unknown=11, NotChecked=122, Total=4032 [2022-11-21 16:42:53,966 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 64 states, 64 states have (on average 1.71875) internal successors, (110), 64 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:44:00,456 WARN L233 SmtUtils]: Spent 36.79s on a formula simplification. DAG size of input: 157 DAG size of output: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:44:14,204 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 164 DAG size of output: 134 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:44:35,467 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 136 DAG size of output: 130 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:44:38,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:44:52,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]