./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s32if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s32if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0 --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 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:16:09,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:16:10,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:16:10,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:16:10,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:16:10,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:16:10,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:16:10,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:16:10,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:16:10,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:16:10,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:16:10,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:16:10,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:16:10,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:16:10,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:16:10,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:16:10,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:16:10,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:16:10,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:16:10,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:16:10,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:16:10,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:16:10,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:16:10,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:16:10,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:16:10,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:16:10,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:16:10,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:16:10,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:16:10,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:16:10,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:16:10,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:16:10,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:16:10,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:16:10,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:16:10,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:16:10,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:16:10,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:16:10,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:16:10,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:16:10,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:16:10,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:16:10,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:16:10,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:16:10,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:16:10,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:16:10,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:16:10,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:16:10,193 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:16:10,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:16:10,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:16:10,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:16:10,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:16:10,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:16:10,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:16:10,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:16:10,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:16:10,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:16:10,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:16:10,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:16:10,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:16:10,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:16:10,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:16:10,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:16:10,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:10,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:16:10,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:16:10,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:16:10,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:16:10,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:16:10,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:16:10,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:16:10,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:16:10,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:16:10,202 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_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 [2021-11-22 16:16:10,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:16:10,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:16:10,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:16:10,573 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:16:10,573 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:16:10,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-fpi/s32if.c [2021-11-22 16:16:10,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/data/a8cc04a6a/363fa023e4e3409e82ad4599a3619c85/FLAG82ce38183 [2021-11-22 16:16:11,112 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:16:11,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/sv-benchmarks/c/array-fpi/s32if.c [2021-11-22 16:16:11,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/data/a8cc04a6a/363fa023e4e3409e82ad4599a3619c85/FLAG82ce38183 [2021-11-22 16:16:11,476 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/data/a8cc04a6a/363fa023e4e3409e82ad4599a3619c85 [2021-11-22 16:16:11,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:16:11,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:16:11,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:11,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:16:11,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:16:11,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf4f0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11, skipping insertion in model container [2021-11-22 16:16:11,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:16:11,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:16:11,647 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/sv-benchmarks/c/array-fpi/s32if.c[588,601] [2021-11-22 16:16:11,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:11,677 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:16:11,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/sv-benchmarks/c/array-fpi/s32if.c[588,601] [2021-11-22 16:16:11,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:11,713 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:16:11,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11 WrapperNode [2021-11-22 16:16:11,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:11,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:16:11,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:16:11,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:16:11,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,751 INFO L137 Inliner]: procedures = 17, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 90 [2021-11-22 16:16:11,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:16:11,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:16:11,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:16:11,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:16:11,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:16:11,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:16:11,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:16:11,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:16:11,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (1/1) ... [2021-11-22 16:16:11,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:11,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:16:11,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:16:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:16:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:16:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:16:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 16:16:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 16:16:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:16:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:16:11,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 16:16:11,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:16:11,935 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:16:11,937 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:16:12,131 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:16:12,138 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:16:12,138 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 16:16:12,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:16:12 BoogieIcfgContainer [2021-11-22 16:16:12,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:16:12,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:16:12,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:16:12,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:16:12,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:16:11" (1/3) ... [2021-11-22 16:16:12,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d26492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:16:12, skipping insertion in model container [2021-11-22 16:16:12,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:11" (2/3) ... [2021-11-22 16:16:12,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d26492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:16:12, skipping insertion in model container [2021-11-22 16:16:12,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:16:12" (3/3) ... [2021-11-22 16:16:12,149 INFO L111 eAbstractionObserver]: Analyzing ICFG s32if.c [2021-11-22 16:16:12,155 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:16:12,155 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:16:12,204 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:16:12,212 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:16:12,212 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 16:16:12,227 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) [2021-11-22 16:16:12,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:16:12,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:12,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:12,234 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2021-11-22 16:16:12,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:12,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064275648] [2021-11-22 16:16:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:12,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:12,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:12,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064275648] [2021-11-22 16:16:12,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064275648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:12,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:12,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:16:12,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454629400] [2021-11-22 16:16:12,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:12,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 16:16:12,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 16:16:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:16:12,494 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) [2021-11-22 16:16:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:12,510 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-22 16:16:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 16:16:12,512 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 [2021-11-22 16:16:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:12,521 INFO L225 Difference]: With dead ends: 42 [2021-11-22 16:16:12,521 INFO L226 Difference]: Without dead ends: 19 [2021-11-22 16:16:12,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:16:12,528 INFO L933 BasicCegarLoop]: 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 [2021-11-22 16:16:12,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-22 16:16:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-22 16:16:12,559 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) [2021-11-22 16:16:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-22 16:16:12,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-11-22 16:16:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:12,562 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-22 16:16:12,563 INFO L471 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) [2021-11-22 16:16:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-22 16:16:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:16:12,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:12,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:12,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:16:12,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:12,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2021-11-22 16:16:12,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190466385] [2021-11-22 16:16:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:12,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:12,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:12,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190466385] [2021-11-22 16:16:12,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190466385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:12,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:12,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:16:12,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477893364] [2021-11-22 16:16:12,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:12,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:16:12,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:16:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:16:12,673 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) [2021-11-22 16:16:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:12,758 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-22 16:16:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:16:12,759 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 [2021-11-22 16:16:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:12,760 INFO L225 Difference]: With dead ends: 39 [2021-11-22 16:16:12,760 INFO L226 Difference]: Without dead ends: 27 [2021-11-22 16:16:12,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:16:12,762 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:12,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 11 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-22 16:16:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-22 16:16:12,769 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) [2021-11-22 16:16:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-22 16:16:12,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-11-22 16:16:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:12,771 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-22 16:16:12,771 INFO L471 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) [2021-11-22 16:16:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-22 16:16:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 16:16:12,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:12,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:12,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:16:12,773 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2021-11-22 16:16:12,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:12,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449532258] [2021-11-22 16:16:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:12,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:13,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:13,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449532258] [2021-11-22 16:16:13,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449532258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:13,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871625876] [2021-11-22 16:16:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:13,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:13,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:13,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:13,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:16:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-22 16:16:13,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:13,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 16:16:13,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 16:16:13,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-22 16:16:14,076 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-22 16:16:14,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 52 treesize of output 66 [2021-11-22 16:16:14,553 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-22 16:16:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 57 [2021-11-22 16:16:16,023 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-22 16:16:16,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 64 [2021-11-22 16:16:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:16,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:32,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:16:32,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 846 treesize of output 678 [2021-11-22 16:16:32,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:16:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 632 [2021-11-22 16:16:32,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:16:32,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4381 treesize of output 3929 [2021-11-22 16:16:32,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2973 treesize of output 2971 [2021-11-22 16:16:32,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2967 treesize of output 2965 [2021-11-22 16:16:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:33,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871625876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:33,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:33,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2021-11-22 16:16:33,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370743586] [2021-11-22 16:16:33,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:33,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 16:16:33,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:33,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 16:16:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=434, Unknown=6, NotChecked=0, Total=552 [2021-11-22 16:16:33,747 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:33,909 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-11-22 16:16:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 16:16:33,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-22 16:16:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:33,913 INFO L225 Difference]: With dead ends: 47 [2021-11-22 16:16:33,913 INFO L226 Difference]: Without dead ends: 42 [2021-11-22 16:16:33,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=137, Invalid=507, Unknown=6, NotChecked=0, Total=650 [2021-11-22 16:16:33,915 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:33,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2021-11-22 16:16:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-22 16:16:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-11-22 16:16:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-11-22 16:16:33,934 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2021-11-22 16:16:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:33,935 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-11-22 16:16:33,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-11-22 16:16:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 16:16:33,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:33,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:33,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:34,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-22 16:16:34,160 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:34,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2021-11-22 16:16:34,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:34,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593907258] [2021-11-22 16:16:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:34,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:34,178 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:16:34,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671288853] [2021-11-22 16:16:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:34,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:34,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:34,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:34,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:16:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:34,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 16:16:34,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:34,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-22 16:16:34,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:16:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:34,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:34,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-11-22 16:16:34,434 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-22 16:16:34,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2021-11-22 16:16:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:34,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593907258] [2021-11-22 16:16:34,458 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:16:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671288853] [2021-11-22 16:16:34,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671288853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:34,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:16:34,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-22 16:16:34,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774542193] [2021-11-22 16:16:34,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:34,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 16:16:34,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:34,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 16:16:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:16:34,461 INFO L87 Difference]: Start difference. First operand 33 states and 41 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) [2021-11-22 16:16:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:34,663 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-11-22 16:16:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:16:34,664 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 [2021-11-22 16:16:34,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:34,665 INFO L225 Difference]: With dead ends: 58 [2021-11-22 16:16:34,665 INFO L226 Difference]: Without dead ends: 51 [2021-11-22 16:16:34,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:16:34,666 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:34,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 62 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-22 16:16:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-11-22 16:16:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-11-22 16:16:34,675 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 21 [2021-11-22 16:16:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:34,676 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-11-22 16:16:34,676 INFO L471 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) [2021-11-22 16:16:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-11-22 16:16:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 16:16:34,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:34,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:34,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:34,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:34,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1649883961, now seen corresponding path program 1 times [2021-11-22 16:16:34,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:34,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684280236] [2021-11-22 16:16:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:34,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:35,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:35,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684280236] [2021-11-22 16:16:35,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684280236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:35,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014159298] [2021-11-22 16:16:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:35,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:35,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:35,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:35,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:16:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:35,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:16:35,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:35,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-22 16:16:35,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:16:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:35,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:35,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-22 16:16:35,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-22 16:16:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:35,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014159298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:35,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:35,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-22 16:16:35,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083753998] [2021-11-22 16:16:35,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:35,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:16:35,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:16:35,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:16:35,306 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:35,430 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-11-22 16:16:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:16:35,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-11-22 16:16:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:35,432 INFO L225 Difference]: With dead ends: 58 [2021-11-22 16:16:35,432 INFO L226 Difference]: Without dead ends: 46 [2021-11-22 16:16:35,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:16:35,433 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:35,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-22 16:16:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-11-22 16:16:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-11-22 16:16:35,441 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 21 [2021-11-22 16:16:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:35,441 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-11-22 16:16:35,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:35,442 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-11-22 16:16:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 16:16:35,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:35,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:35,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 16:16:35,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:35,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2021-11-22 16:16:35,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:35,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473287322] [2021-11-22 16:16:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:35,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:35,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473287322] [2021-11-22 16:16:35,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473287322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094645247] [2021-11-22 16:16:35,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:16:35,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:35,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:35,751 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:35,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:16:35,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:16:35,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:35,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:16:35,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:35,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:35,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094645247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:35,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:35,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-22 16:16:35,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529151343] [2021-11-22 16:16:35,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:35,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:16:35,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:16:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:16:35,975 INFO L87 Difference]: Start difference. First operand 41 states and 50 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) [2021-11-22 16:16:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:36,192 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2021-11-22 16:16:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:16:36,192 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 [2021-11-22 16:16:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:36,193 INFO L225 Difference]: With dead ends: 69 [2021-11-22 16:16:36,193 INFO L226 Difference]: Without dead ends: 59 [2021-11-22 16:16:36,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:16:36,195 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:36,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 28 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:16:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-22 16:16:36,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-11-22 16:16:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:36,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-22 16:16:36,202 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-11-22 16:16:36,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:36,202 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-22 16:16:36,203 INFO L471 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) [2021-11-22 16:16:36,203 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-22 16:16:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 16:16:36,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:36,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:36,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:36,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-22 16:16:36,424 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:36,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:36,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2021-11-22 16:16:36,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:36,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010103084] [2021-11-22 16:16:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:36,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:36,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:36,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010103084] [2021-11-22 16:16:36,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010103084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:36,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046413769] [2021-11-22 16:16:36,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:16:36,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:36,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:36,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:36,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:16:36,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 16:16:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:16:36,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:36,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:36,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046413769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:36,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:36,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-22 16:16:36,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071927501] [2021-11-22 16:16:36,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:36,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:16:36,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:36,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:16:36,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:16:36,747 INFO L87 Difference]: Start difference. First operand 39 states and 47 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) [2021-11-22 16:16:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:36,885 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2021-11-22 16:16:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:16:36,885 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 [2021-11-22 16:16:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:36,886 INFO L225 Difference]: With dead ends: 73 [2021-11-22 16:16:36,886 INFO L226 Difference]: Without dead ends: 42 [2021-11-22 16:16:36,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:16:36,888 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:36,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 26 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-22 16:16:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-11-22 16:16:36,893 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) [2021-11-22 16:16:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-11-22 16:16:36,894 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2021-11-22 16:16:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:36,894 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-11-22 16:16:36,894 INFO L471 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) [2021-11-22 16:16:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-11-22 16:16:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 16:16:36,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:36,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:36,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:37,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 16:16:37,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:37,111 INFO L85 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2021-11-22 16:16:37,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:37,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326781192] [2021-11-22 16:16:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:37,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:16:37,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:37,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326781192] [2021-11-22 16:16:37,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326781192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99572083] [2021-11-22 16:16:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:16:37,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:37,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:37,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:37,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:16:37,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:16:37,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:37,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-22 16:16:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:37,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 16:16:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-22 16:16:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:38,120 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 16:16:38,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-22 16:16:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:38,414 INFO L354 Elim1Store]: treesize reduction 62, result has 44.1 percent of original size [2021-11-22 16:16:38,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 78 [2021-11-22 16:16:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:38,715 INFO L354 Elim1Store]: treesize reduction 62, result has 44.1 percent of original size [2021-11-22 16:16:38,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 91 [2021-11-22 16:16:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:39,782 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-22 16:16:39,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 76 [2021-11-22 16:16:40,221 INFO L354 Elim1Store]: treesize reduction 270, result has 12.6 percent of original size [2021-11-22 16:16:40,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 139 treesize of output 95 [2021-11-22 16:16:43,969 INFO L354 Elim1Store]: treesize reduction 96, result has 29.9 percent of original size [2021-11-22 16:16:43,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 119 [2021-11-22 16:16:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:44,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:46,532 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_67| Int) (|v_ULTIMATE.start_main_~i~0#1_64| Int)) (let ((.cse5 (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (store .cse6 .cse7 (+ (select .cse6 .cse7) 3))))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_67| 4)))) (.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_64| 4))))) (or (not (= .cse0 4)) (= (* 4 c_~N~0) (+ .cse1 .cse2 .cse0)) (not (= .cse1 4))))))))) is different from false [2021-11-22 16:16:48,651 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_69| Int) (|v_ULTIMATE.start_main_~i~0#1_67| Int) (|v_ULTIMATE.start_main_~i~0#1_64| Int)) (let ((.cse5 (let ((.cse6 (let ((.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (store .cse8 .cse9 (+ (select .cse8 .cse9) 3)))) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_69| 4)))) (store .cse6 .cse7 (+ (select .cse6 .cse7) 3))))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse1 (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_67| 4))))) (let ((.cse0 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_64| 4))))) (or (not (= .cse0 4)) (not (= .cse1 4)) (= (+ .cse0 .cse2 .cse1) (* 4 c_~N~0))))))))) is different from false [2021-11-22 16:16:53,309 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_69| Int) (|v_ULTIMATE.start_main_~i~0#1_67| Int) (|v_ULTIMATE.start_main_~i~0#1_64| Int) (|v_ULTIMATE.start_main_~i~0#1_72| Int)) (let ((.cse5 (let ((.cse6 (let ((.cse8 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1)) (.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_72| 4)))) (store .cse8 .cse9 (+ (select .cse8 .cse9) 3)))) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_69| 4)))) (store .cse6 .cse7 (+ (select .cse6 .cse7) 3))))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse1 (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_67| 4))))) (let ((.cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_64| 4))))) (or (and (<= (div (+ .cse0 (- 1) .cse1 .cse2) 4) |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) (div (+ .cse0 .cse1 .cse2) 4))) (not (= .cse2 4)) (not (= .cse1 4))))))))) is different from false [2021-11-22 16:16:55,507 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_69| Int) (|v_ULTIMATE.start_main_~i~0#1_67| Int) (|v_ULTIMATE.start_main_~i~0#1_64| Int) (|v_ULTIMATE.start_main_~i~0#1_72| Int)) (let ((.cse5 (let ((.cse6 (let ((.cse8 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) 1)) (.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_72| 4)))) (store .cse8 .cse9 (+ (select .cse8 .cse9) 3)))) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_69| 4)))) (store .cse6 .cse7 (+ 3 (select .cse6 .cse7)))))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_67| 4)))) (.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_64| 4))))) (or (not (= .cse0 4)) (not (= .cse1 4)) (and (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (div (+ .cse1 .cse0 .cse2) 4)) (<= (div (+ (- 1) .cse1 .cse0 .cse2) 4) (+ |c_ULTIMATE.start_main_~i~0#1| 1)))))))))) is different from false [2021-11-22 16:16:57,738 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_69| Int) (|v_ULTIMATE.start_main_~i~0#1_67| Int) (|v_ULTIMATE.start_main_~i~0#1_64| Int) (|v_ULTIMATE.start_main_~i~0#1_72| Int)) (let ((.cse5 (let ((.cse6 (let ((.cse8 (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse10) 1) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse10 4) 1))) (.cse9 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_72| 4)))) (store .cse8 .cse9 (+ 3 (select .cse8 .cse9))))) (.cse7 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_69| 4)))) (store .cse6 .cse7 (+ (select .cse6 .cse7) 3))))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse0 (select .cse5 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_67| 4))))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |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_ULTIMATE.start_main_~i~0#1_64| 4))))) (or (not (= .cse0 4)) (not (= .cse1 4)) (and (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (div (+ .cse2 .cse0 .cse1) 4)) (<= (div (+ (- 1) .cse2 .cse0 .cse1) 4) (+ |c_ULTIMATE.start_main_~i~0#1| 1)))))))))) is different from false [2021-11-22 16:16:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-22 16:16:57,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99572083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:57,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:57,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 41 [2021-11-22 16:16:57,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192839301] [2021-11-22 16:16:57,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:57,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-22 16:16:57,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-22 16:16:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1087, Unknown=5, NotChecked=360, Total=1640 [2021-11-22 16:16:57,782 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 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) [2021-11-22 16:17:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:08,342 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-11-22 16:17:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 16:17:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 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 29 [2021-11-22 16:17:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:08,344 INFO L225 Difference]: With dead ends: 86 [2021-11-22 16:17:08,344 INFO L226 Difference]: Without dead ends: 81 [2021-11-22 16:17:08,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=346, Invalid=1831, Unknown=5, NotChecked=470, Total=2652 [2021-11-22 16:17:08,346 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:08,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 131 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 303 Invalid, 0 Unknown, 536 Unchecked, 0.4s Time] [2021-11-22 16:17:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-22 16:17:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-11-22 16:17:08,356 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) [2021-11-22 16:17:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-11-22 16:17:08,357 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 29 [2021-11-22 16:17:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:08,358 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-11-22 16:17:08,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 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) [2021-11-22 16:17:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-11-22 16:17:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 16:17:08,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:08,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:08,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:08,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:17:08,575 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:17:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2021-11-22 16:17:08,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:17:08,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050154064] [2021-11-22 16:17:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:08,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:17:08,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:17:08,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377202015] [2021-11-22 16:17:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:08,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:17:08,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:17:08,595 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:17:08,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:17:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-22 16:17:08,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:08,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-22 16:17:08,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:17:08,876 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-22 16:17:08,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 40 treesize of output 38 [2021-11-22 16:17:08,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:17:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:17:08,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:12,387 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse0 |ULTIMATE.start_main_~#sum~0#1.offset|))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 4)) is different from false [2021-11-22 16:17:14,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:17:14,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 574 treesize of output 524 [2021-11-22 16:17:14,658 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-11-22 16:17:14,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 69 [2021-11-22 16:17:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2021-11-22 16:17:15,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:17:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050154064] [2021-11-22 16:17:15,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:17:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377202015] [2021-11-22 16:17:15,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377202015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:15,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:15,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-22 16:17:15,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332622247] [2021-11-22 16:17:15,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:15,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 16:17:15,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:17:15,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 16:17:15,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=4, NotChecked=32, Total=342 [2021-11-22 16:17:15,580 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) [2021-11-22 16:17:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:15,967 INFO L93 Difference]: Finished difference Result 144 states and 185 transitions. [2021-11-22 16:17:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:17:15,968 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 [2021-11-22 16:17:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:15,969 INFO L225 Difference]: With dead ends: 144 [2021-11-22 16:17:15,969 INFO L226 Difference]: Without dead ends: 137 [2021-11-22 16:17:15,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=4, NotChecked=38, Total=462 [2021-11-22 16:17:15,970 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:15,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 112 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 305 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2021-11-22 16:17:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-22 16:17:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2021-11-22 16:17:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2021-11-22 16:17:15,986 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 29 [2021-11-22 16:17:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:15,986 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2021-11-22 16:17:15,986 INFO L471 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) [2021-11-22 16:17:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2021-11-22 16:17:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 16:17:15,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:15,988 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:17:16,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:16,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:17:16,216 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:17:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash -968292246, now seen corresponding path program 1 times [2021-11-22 16:17:16,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:17:16,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247338283] [2021-11-22 16:17:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:16,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:17:16,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:17:16,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726287488] [2021-11-22 16:17:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:16,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:17:16,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:17:16,225 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:17:16,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:17:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:17:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:16,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-22 16:17:16,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:17:16,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:17:16,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-22 16:17:16,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:17:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:17:16,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:16,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-22 16:17:16,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-22 16:17:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:17:16,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:17:16,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247338283] [2021-11-22 16:17:16,536 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:17:16,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726287488] [2021-11-22 16:17:16,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726287488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:16,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:16,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-22 16:17:16,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046835824] [2021-11-22 16:17:16,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:16,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:17:16,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:17:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:17:16,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:17:16,538 INFO L87 Difference]: Start difference. First operand 81 states and 102 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) [2021-11-22 16:17:16,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:16,705 INFO L93 Difference]: Finished difference Result 123 states and 158 transitions. [2021-11-22 16:17:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:17:16,706 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 [2021-11-22 16:17:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:16,707 INFO L225 Difference]: With dead ends: 123 [2021-11-22 16:17:16,707 INFO L226 Difference]: Without dead ends: 92 [2021-11-22 16:17:16,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:17:16,708 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:16,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 65 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:17:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-22 16:17:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-11-22 16:17:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2021-11-22 16:17:16,720 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 29 [2021-11-22 16:17:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:16,720 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2021-11-22 16:17:16,721 INFO L471 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) [2021-11-22 16:17:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2021-11-22 16:17:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 16:17:16,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:16,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:16,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:16,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 16:17:16,936 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:17:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash -554569936, now seen corresponding path program 5 times [2021-11-22 16:17:16,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:17:16,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81585254] [2021-11-22 16:17:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:16,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:17:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:17:17,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:17:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81585254] [2021-11-22 16:17:17,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81585254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:17:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167517705] [2021-11-22 16:17:17,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:17:17,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:17:17,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:17:17,038 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:17:17,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:17:17,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 16:17:17,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:17:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:17:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:17:17,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:17:17,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167517705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:17,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:17:17,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-22 16:17:17,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841600963] [2021-11-22 16:17:17,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:17,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 16:17:17,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:17:17,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 16:17:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:17:17,296 INFO L87 Difference]: Start difference. First operand 81 states and 100 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) [2021-11-22 16:17:17,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:17,627 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2021-11-22 16:17:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:17:17,628 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 [2021-11-22 16:17:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:17,629 INFO L225 Difference]: With dead ends: 115 [2021-11-22 16:17:17,629 INFO L226 Difference]: Without dead ends: 102 [2021-11-22 16:17:17,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-11-22 16:17:17,630 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:17,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 34 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:17:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-22 16:17:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-11-22 16:17:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 79 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-11-22 16:17:17,642 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 31 [2021-11-22 16:17:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:17,642 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-11-22 16:17:17,643 INFO L471 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) [2021-11-22 16:17:17,643 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-11-22 16:17:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 16:17:17,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:17,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:17,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:17,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:17:17,860 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:17:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1053387787, now seen corresponding path program 6 times [2021-11-22 16:17:17,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:17:17,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632513557] [2021-11-22 16:17:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:17,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:17:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:17:17,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:17:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632513557] [2021-11-22 16:17:17,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632513557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:17:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614163854] [2021-11-22 16:17:17,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:17:17,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:17:17,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:17:17,960 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:17:17,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 16:17:18,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-22 16:17:18,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:17:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:17:18,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:17:18,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:17:18,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614163854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:18,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:17:18,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-22 16:17:18,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369147003] [2021-11-22 16:17:18,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:18,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 16:17:18,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:17:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 16:17:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:17:18,228 INFO L87 Difference]: Start difference. First operand 80 states and 100 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) [2021-11-22 16:17:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:18,413 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2021-11-22 16:17:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:17:18,414 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 [2021-11-22 16:17:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:18,414 INFO L225 Difference]: With dead ends: 103 [2021-11-22 16:17:18,414 INFO L226 Difference]: Without dead ends: 50 [2021-11-22 16:17:18,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:17:18,415 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:18,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 41 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:17:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-22 16:17:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-11-22 16:17:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-11-22 16:17:18,422 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 32 [2021-11-22 16:17:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:18,423 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-11-22 16:17:18,423 INFO L471 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) [2021-11-22 16:17:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-11-22 16:17:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-22 16:17:18,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:18,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:18,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:18,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 16:17:18,640 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:17:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:18,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1383779305, now seen corresponding path program 7 times [2021-11-22 16:17:18,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:17:18,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844573172] [2021-11-22 16:17:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:18,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:17:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 16:17:19,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:17:19,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844573172] [2021-11-22 16:17:19,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844573172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:17:19,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541895698] [2021-11-22 16:17:19,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:17:19,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:17:19,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:17:19,576 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:17:19,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea87094-62ca-4f69-b8d5-4a5bc263d379/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 16:17:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:19,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 16:17:19,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:19,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 16:17:19,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 16:17:19,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-22 16:17:19,787 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-22 16:17:19,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-22 16:17:19,897 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-22 16:17:19,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 47 treesize of output 52 [2021-11-22 16:17:20,188 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-11-22 16:17:20,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 58 treesize of output 106 [2021-11-22 16:17:20,976 INFO L354 Elim1Store]: treesize reduction 188, result has 35.8 percent of original size [2021-11-22 16:17:20,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 130 treesize of output 185 [2021-11-22 16:17:22,675 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-11-22 16:17:22,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 233 treesize of output 179 [2021-11-22 16:17:32,329 INFO L354 Elim1Store]: treesize reduction 200, result has 0.5 percent of original size [2021-11-22 16:17:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 567 treesize of output 377 [2021-11-22 16:17:36,958 INFO L354 Elim1Store]: treesize reduction 288, result has 0.3 percent of original size [2021-11-22 16:17:36,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 578 treesize of output 391 [2021-11-22 16:17:41,879 INFO L354 Elim1Store]: treesize reduction 634, result has 9.9 percent of original size [2021-11-22 16:17:41,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 592 treesize of output 397