./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_running-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_running-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX --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 b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:39:41,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:39:41,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:39:41,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:39:41,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:39:41,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:39:41,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:39:41,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:39:41,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:39:41,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:39:41,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:39:41,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:39:41,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:39:41,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:39:41,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:39:41,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:39:41,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:39:41,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:39:41,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:39:41,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:39:41,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:39:41,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:39:41,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:39:41,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:39:41,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:39:41,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:39:41,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:39:41,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:39:41,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:39:41,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:39:41,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:39:41,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:39:41,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:39:41,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:39:41,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:39:41,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:39:41,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:39:41,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:39:41,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:39:41,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:39:41,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:39:41,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:39:41,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:39:41,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:39:41,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:39:41,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:39:41,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:39:41,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:39:41,826 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:39:41,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:39:41,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:39:41,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:39:41,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:39:41,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:39:41,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:39:41,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:39:41,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:39:41,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:39:41,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:39:41,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:39:41,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:39:41,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:39:41,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:39:41,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:39:41,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:39:41,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:39:41,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:39:41,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:39:41,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:39:41,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:39:41,834 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:39:41,836 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:39:41,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:39:41,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:39:41,837 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_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2021-11-09 08:39:42,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:39:42,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:39:42,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:39:42,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:39:42,226 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:39:42,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-examples/standard_running-2.i [2021-11-09 08:39:42,322 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/data/09259f4cb/af96035fda7f4b3d830b664731c3d50e/FLAG3cbe81596 [2021-11-09 08:39:42,927 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:39:42,928 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/sv-benchmarks/c/array-examples/standard_running-2.i [2021-11-09 08:39:42,943 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/data/09259f4cb/af96035fda7f4b3d830b664731c3d50e/FLAG3cbe81596 [2021-11-09 08:39:43,260 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/data/09259f4cb/af96035fda7f4b3d830b664731c3d50e [2021-11-09 08:39:43,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:39:43,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:39:43,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:39:43,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:39:43,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:39:43,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b7b6eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43, skipping insertion in model container [2021-11-09 08:39:43,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:39:43,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:39:43,581 WARN L228 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_89c847a0-63c5-4691-a215-3e22b0b33e10/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2021-11-09 08:39:43,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:39:43,633 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:39:43,654 WARN L228 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_89c847a0-63c5-4691-a215-3e22b0b33e10/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2021-11-09 08:39:43,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:39:43,701 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:39:43,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43 WrapperNode [2021-11-09 08:39:43,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:39:43,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:39:43,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:39:43,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:39:43,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:39:43,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:39:43,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:39:43,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:39:43,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:39:43,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:39:43,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:39:43,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:39:43,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (1/1) ... [2021-11-09 08:39:43,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:39:43,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:43,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:39:43,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:39:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:39:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:39:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:39:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:39:43,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:39:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:39:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:39:44,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:39:44,293 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 08:39:44,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:39:44 BoogieIcfgContainer [2021-11-09 08:39:44,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:39:44,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:39:44,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:39:44,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:39:44,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:39:43" (1/3) ... [2021-11-09 08:39:44,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf25250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:39:44, skipping insertion in model container [2021-11-09 08:39:44,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:43" (2/3) ... [2021-11-09 08:39:44,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf25250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:39:44, skipping insertion in model container [2021-11-09 08:39:44,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:39:44" (3/3) ... [2021-11-09 08:39:44,308 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2021-11-09 08:39:44,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:39:44,314 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:39:44,429 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:39:44,445 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 [2021-11-09 08:39:44,446 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:39:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:39:44,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:44,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:44,486 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2021-11-09 08:39:44,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:44,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788806113] [2021-11-09 08:39:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:44,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:44,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:44,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788806113] [2021-11-09 08:39:44,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788806113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:44,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:44,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:44,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619795378] [2021-11-09 08:39:44,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:44,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:44,869 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:45,002 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2021-11-09 08:39:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:45,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-09 08:39:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:45,017 INFO L225 Difference]: With dead ends: 56 [2021-11-09 08:39:45,018 INFO L226 Difference]: Without dead ends: 32 [2021-11-09 08:39:45,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-09 08:39:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-09 08:39:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-09 08:39:45,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2021-11-09 08:39:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:45,102 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-09 08:39:45,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-09 08:39:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:39:45,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:45,106 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:45,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:39:45,107 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2021-11-09 08:39:45,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:45,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161209710] [2021-11-09 08:39:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:45,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:45,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:45,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161209710] [2021-11-09 08:39:45,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161209710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:45,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164142593] [2021-11-09 08:39:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:45,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:45,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:45,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:45,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:39:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:45,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:39:45,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:39:45,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164142593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:45,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:45,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:39:45,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241877010] [2021-11-09 08:39:45,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:39:45,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:39:45,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:39:45,554 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:45,689 INFO L93 Difference]: Finished difference Result 62 states and 88 transitions. [2021-11-09 08:39:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:39:45,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 08:39:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:45,697 INFO L225 Difference]: With dead ends: 62 [2021-11-09 08:39:45,697 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 08:39:45,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:39:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 08:39:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-11-09 08:39:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 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) [2021-11-09 08:39:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-11-09 08:39:45,709 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 22 [2021-11-09 08:39:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:45,710 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-11-09 08:39:45,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-11-09 08:39:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:39:45,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:45,712 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:45,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:45,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:45,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash 36788574, now seen corresponding path program 2 times [2021-11-09 08:39:45,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:45,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256090500] [2021-11-09 08:39:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:45,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:39:46,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:46,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256090500] [2021-11-09 08:39:46,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256090500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:46,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:46,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:39:46,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004454742] [2021-11-09 08:39:46,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:39:46,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:39:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:39:46,095 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:46,215 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2021-11-09 08:39:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:39:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:39:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:46,217 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:39:46,217 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 08:39:46,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:39:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 08:39:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-11-09 08:39:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-11-09 08:39:46,227 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 34 [2021-11-09 08:39:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:46,227 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-11-09 08:39:46,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2021-11-09 08:39:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:39:46,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:46,230 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:46,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:39:46,230 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -492759138, now seen corresponding path program 1 times [2021-11-09 08:39:46,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:46,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990614922] [2021-11-09 08:39:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:46,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:39:46,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:46,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990614922] [2021-11-09 08:39:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990614922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:46,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:46,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:39:46,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257956045] [2021-11-09 08:39:46,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:39:46,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:39:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:39:46,335 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:46,410 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2021-11-09 08:39:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:39:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:39:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:46,412 INFO L225 Difference]: With dead ends: 69 [2021-11-09 08:39:46,412 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 08:39:46,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:39:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 08:39:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-11-09 08:39:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-11-09 08:39:46,421 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 34 [2021-11-09 08:39:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:46,422 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-11-09 08:39:46,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-11-09 08:39:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:39:46,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:46,424 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:46,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:39:46,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash 271130974, now seen corresponding path program 1 times [2021-11-09 08:39:46,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:46,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302288248] [2021-11-09 08:39:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:46,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:39:46,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:46,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302288248] [2021-11-09 08:39:46,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302288248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:46,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638942561] [2021-11-09 08:39:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:46,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:46,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:46,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:46,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:39:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:39:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:39:46,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638942561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:46,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:46,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 08:39:46,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374982096] [2021-11-09 08:39:46,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:39:46,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:46,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:39:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:39:46,774 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:46,915 INFO L93 Difference]: Finished difference Result 108 states and 150 transitions. [2021-11-09 08:39:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:39:46,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:39:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:46,918 INFO L225 Difference]: With dead ends: 108 [2021-11-09 08:39:46,918 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 08:39:46,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:39:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 08:39:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-11-09 08:39:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 58 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2021-11-09 08:39:46,930 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2021-11-09 08:39:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:46,931 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2021-11-09 08:39:46,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2021-11-09 08:39:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:39:46,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:46,934 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:46,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:47,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:47,153 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash 984188611, now seen corresponding path program 2 times [2021-11-09 08:39:47,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:47,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92198199] [2021-11-09 08:39:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:47,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:39:47,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:47,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92198199] [2021-11-09 08:39:47,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92198199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:47,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056693924] [2021-11-09 08:39:47,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:39:47,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:47,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:47,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:39:47,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:39:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:39:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:39:47,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056693924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:47,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:47,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 08:39:47,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106688706] [2021-11-09 08:39:47,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:39:47,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:47,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:39:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:39:47,598 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:47,761 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2021-11-09 08:39:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:39:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:39:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:47,767 INFO L225 Difference]: With dead ends: 138 [2021-11-09 08:39:47,767 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 08:39:47,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:39:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 08:39:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-11-09 08:39:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2021-11-09 08:39:47,793 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 46 [2021-11-09 08:39:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:47,794 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2021-11-09 08:39:47,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2021-11-09 08:39:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:39:47,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:47,806 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:47,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:48,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:39:48,022 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 3 times [2021-11-09 08:39:48,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:48,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063795625] [2021-11-09 08:39:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:48,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-09 08:39:48,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:48,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063795625] [2021-11-09 08:39:48,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063795625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:48,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509875703] [2021-11-09 08:39:48,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:39:48,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:48,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:48,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:48,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:39:48,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:39:48,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:48,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:39:48,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:48,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:39:49,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:49,283 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 47 treesize of output 39 [2021-11-09 08:39:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 08:39:49,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509875703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:49,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:49,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-11-09 08:39:49,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124910930] [2021-11-09 08:39:49,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:39:49,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:49,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:39:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:39:49,437 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:50,388 INFO L93 Difference]: Finished difference Result 290 states and 416 transitions. [2021-11-09 08:39:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:39:50,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 08:39:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:50,393 INFO L225 Difference]: With dead ends: 290 [2021-11-09 08:39:50,393 INFO L226 Difference]: Without dead ends: 226 [2021-11-09 08:39:50,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:39:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-09 08:39:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2021-11-09 08:39:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.4039408866995073) internal successors, (285), 203 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2021-11-09 08:39:50,421 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 58 [2021-11-09 08:39:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:50,426 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2021-11-09 08:39:50,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2021-11-09 08:39:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 08:39:50,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:50,429 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:50,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:50,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:50,643 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash -937413107, now seen corresponding path program 1 times [2021-11-09 08:39:50,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:50,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498142594] [2021-11-09 08:39:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:50,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-09 08:39:50,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:50,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498142594] [2021-11-09 08:39:50,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498142594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:50,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200631607] [2021-11-09 08:39:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:50,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:50,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:50,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:50,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:39:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:39:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-09 08:39:51,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200631607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:51,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:51,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 08:39:51,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464535111] [2021-11-09 08:39:51,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:39:51,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:39:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:39:51,411 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-11-09 08:39:51,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:51,634 INFO L93 Difference]: Finished difference Result 472 states and 660 transitions. [2021-11-09 08:39:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:39:51,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 94 [2021-11-09 08:39:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:51,639 INFO L225 Difference]: With dead ends: 472 [2021-11-09 08:39:51,639 INFO L226 Difference]: Without dead ends: 285 [2021-11-09 08:39:51,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:39:51,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-09 08:39:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2021-11-09 08:39:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.4043478260869566) internal successors, (323), 230 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 323 transitions. [2021-11-09 08:39:51,693 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 323 transitions. Word has length 94 [2021-11-09 08:39:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:51,694 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 323 transitions. [2021-11-09 08:39:51,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-11-09 08:39:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 323 transitions. [2021-11-09 08:39:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:39:51,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:51,697 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:51,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:51,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:51,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:51,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1234891020, now seen corresponding path program 2 times [2021-11-09 08:39:51,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:51,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928838637] [2021-11-09 08:39:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:51,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-09 08:39:52,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:52,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928838637] [2021-11-09 08:39:52,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928838637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:52,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412483711] [2021-11-09 08:39:52,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:39:52,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:52,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:52,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:52,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:39:52,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:39:52,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:52,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:39:52,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-09 08:39:52,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412483711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:52,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:52,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 08:39:52,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342692574] [2021-11-09 08:39:52,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:39:52,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:52,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:39:52,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:39:52,701 INFO L87 Difference]: Start difference. First operand 231 states and 323 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:52,950 INFO L93 Difference]: Finished difference Result 524 states and 734 transitions. [2021-11-09 08:39:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:39:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:39:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:52,954 INFO L225 Difference]: With dead ends: 524 [2021-11-09 08:39:52,954 INFO L226 Difference]: Without dead ends: 312 [2021-11-09 08:39:52,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:39:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-09 08:39:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 258. [2021-11-09 08:39:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.404669260700389) internal successors, (361), 257 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 361 transitions. [2021-11-09 08:39:52,972 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 361 transitions. Word has length 106 [2021-11-09 08:39:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:52,972 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 361 transitions. [2021-11-09 08:39:52,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 361 transitions. [2021-11-09 08:39:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-09 08:39:52,975 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:52,975 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:53,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:53,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 08:39:53,198 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash -967925327, now seen corresponding path program 3 times [2021-11-09 08:39:53,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:53,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305465121] [2021-11-09 08:39:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:53,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-09 08:39:53,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:53,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305465121] [2021-11-09 08:39:53,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305465121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:53,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735471022] [2021-11-09 08:39:53,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:39:53,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:53,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:53,377 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:53,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:39:53,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:39:53,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:53,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:39:53,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:53,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:39:53,826 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:39:53,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:39:55,330 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-09 08:39:55,331 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 59 treesize of output 52 [2021-11-09 08:39:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 39 proven. 101 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-09 08:39:55,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735471022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:55,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:55,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-11-09 08:39:55,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306722691] [2021-11-09 08:39:55,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:39:55,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:55,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:39:55,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:39:55,607 INFO L87 Difference]: Start difference. First operand 258 states and 361 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) [2021-11-09 08:39:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:59,425 INFO L93 Difference]: Finished difference Result 890 states and 1256 transitions. [2021-11-09 08:39:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-09 08:39:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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 118 [2021-11-09 08:39:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:59,431 INFO L225 Difference]: With dead ends: 890 [2021-11-09 08:39:59,431 INFO L226 Difference]: Without dead ends: 653 [2021-11-09 08:39:59,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1857, Invalid=6333, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 08:39:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-09 08:39:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 516. [2021-11-09 08:39:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.4194174757281552) internal successors, (731), 515 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 731 transitions. [2021-11-09 08:39:59,464 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 731 transitions. Word has length 118 [2021-11-09 08:39:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:59,464 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 731 transitions. [2021-11-09 08:39:59,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) [2021-11-09 08:39:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 731 transitions. [2021-11-09 08:39:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 08:39:59,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:59,468 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:59,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:59,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:59,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1090307401, now seen corresponding path program 4 times [2021-11-09 08:39:59,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:59,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230064305] [2021-11-09 08:39:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:59,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2021-11-09 08:39:59,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:59,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230064305] [2021-11-09 08:39:59,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230064305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:59,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488645700] [2021-11-09 08:39:59,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:39:59,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:59,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:59,956 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:59,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:40:00,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:40:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:00,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 08:40:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:00,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:40:00,752 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:40:00,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:40:00,879 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-09 08:40:00,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-09 08:40:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 197 proven. 592 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-09 08:40:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488645700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:02,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:02,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 30] total 43 [2021-11-09 08:40:02,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99124309] [2021-11-09 08:40:02,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:40:02,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:02,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:40:02,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:40:02,894 INFO L87 Difference]: Start difference. First operand 516 states and 731 transitions. Second operand has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 43 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:04,456 INFO L93 Difference]: Finished difference Result 1471 states and 2083 transitions. [2021-11-09 08:40:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:40:04,457 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 43 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-09 08:40:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:04,469 INFO L225 Difference]: With dead ends: 1471 [2021-11-09 08:40:04,471 INFO L226 Difference]: Without dead ends: 984 [2021-11-09 08:40:04,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1636, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:40:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-11-09 08:40:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 680. [2021-11-09 08:40:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.422680412371134) internal successors, (966), 679 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 966 transitions. [2021-11-09 08:40:04,521 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 966 transitions. Word has length 166 [2021-11-09 08:40:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:04,521 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 966 transitions. [2021-11-09 08:40:04,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 43 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 966 transitions. [2021-11-09 08:40:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-09 08:40:04,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:04,526 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:04,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:04,753 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1067722828, now seen corresponding path program 5 times [2021-11-09 08:40:04,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:04,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759475560] [2021-11-09 08:40:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:04,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2021-11-09 08:40:05,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:05,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759475560] [2021-11-09 08:40:05,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759475560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:05,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240069391] [2021-11-09 08:40:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:40:05,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:05,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:05,086 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:05,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:40:36,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-11-09 08:40:36,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:40:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-09 08:40:36,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240069391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:36,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:36,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 08:40:36,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742130630] [2021-11-09 08:40:36,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:40:36,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:40:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:40:36,784 INFO L87 Difference]: Start difference. First operand 680 states and 966 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:37,150 INFO L93 Difference]: Finished difference Result 1566 states and 2226 transitions. [2021-11-09 08:40:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:40:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 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 178 [2021-11-09 08:40:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:37,158 INFO L225 Difference]: With dead ends: 1566 [2021-11-09 08:40:37,158 INFO L226 Difference]: Without dead ends: 917 [2021-11-09 08:40:37,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:40:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-09 08:40:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 721. [2021-11-09 08:40:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.4222222222222223) internal successors, (1024), 720 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1024 transitions. [2021-11-09 08:40:37,202 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1024 transitions. Word has length 178 [2021-11-09 08:40:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:37,202 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1024 transitions. [2021-11-09 08:40:37,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:37,203 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1024 transitions. [2021-11-09 08:40:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-09 08:40:37,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:37,207 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:37,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:37,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:37,421 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1455991971, now seen corresponding path program 6 times [2021-11-09 08:40:37,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:37,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742331155] [2021-11-09 08:40:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:37,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-09 08:40:37,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:37,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742331155] [2021-11-09 08:40:37,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742331155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:37,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703556255] [2021-11-09 08:40:37,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:40:37,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:37,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:37,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:37,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:40:38,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 08:40:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:40:38,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:39,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:40:39,136 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:40:39,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:40:39,283 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 08:40:39,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-11-09 08:40:47,835 INFO L354 Elim1Store]: treesize reduction 62, result has 39.8 percent of original size [2021-11-09 08:40:47,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 69 [2021-11-09 08:40:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 106 proven. 266 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2021-11-09 08:40:48,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703556255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:48,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:48,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-11-09 08:40:48,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110022931] [2021-11-09 08:40:48,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:40:48,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:40:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=696, Unknown=3, NotChecked=0, Total=992 [2021-11-09 08:40:48,243 INFO L87 Difference]: Start difference. First operand 721 states and 1024 transitions. Second operand has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:06,521 INFO L93 Difference]: Finished difference Result 2332 states and 3313 transitions. [2021-11-09 08:46:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-11-09 08:46:06,522 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 0 states have call successors, (0), 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 190 [2021-11-09 08:46:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:06,533 INFO L225 Difference]: With dead ends: 2332 [2021-11-09 08:46:06,533 INFO L226 Difference]: Without dead ends: 1644 [2021-11-09 08:46:06,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11645 ImplicationChecksByTransitivity, 295.8s TimeCoverageRelationStatistics Valid=6235, Invalid=23708, Unknown=159, NotChecked=0, Total=30102 [2021-11-09 08:46:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-11-09 08:46:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1156. [2021-11-09 08:46:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.4268398268398268) internal successors, (1648), 1155 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1648 transitions. [2021-11-09 08:46:06,614 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1648 transitions. Word has length 190 [2021-11-09 08:46:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:06,615 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1648 transitions. [2021-11-09 08:46:06,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1648 transitions. [2021-11-09 08:46:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-09 08:46:06,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:06,622 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:06,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:06,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:46:06,845 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash -32451998, now seen corresponding path program 7 times [2021-11-09 08:46:06,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:06,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047174585] [2021-11-09 08:46:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:06,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1940 trivial. 0 not checked. [2021-11-09 08:46:07,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047174585] [2021-11-09 08:46:07,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047174585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025504595] [2021-11-09 08:46:07,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:46:07,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:07,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:07,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:46:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:46:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1940 trivial. 0 not checked. [2021-11-09 08:46:08,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025504595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:08,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:08,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 08:46:08,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374690258] [2021-11-09 08:46:08,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:46:08,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:08,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:46:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:46:08,504 INFO L87 Difference]: Start difference. First operand 1156 states and 1648 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:08,899 INFO L93 Difference]: Finished difference Result 2775 states and 3956 transitions. [2021-11-09 08:46:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:46:08,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-09 08:46:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:08,908 INFO L225 Difference]: With dead ends: 2775 [2021-11-09 08:46:08,908 INFO L226 Difference]: Without dead ends: 1662 [2021-11-09 08:46:08,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:46:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-11-09 08:46:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1208. [2021-11-09 08:46:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 1.4266777133388566) internal successors, (1722), 1207 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1722 transitions. [2021-11-09 08:46:08,984 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1722 transitions. Word has length 250 [2021-11-09 08:46:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:08,986 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1722 transitions. [2021-11-09 08:46:08,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1722 transitions. [2021-11-09 08:46:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-09 08:46:08,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:08,992 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:09,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:09,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:46:09,217 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash -456784821, now seen corresponding path program 8 times [2021-11-09 08:46:09,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:09,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279308018] [2021-11-09 08:46:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:09,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2021-11-09 08:46:09,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:09,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279308018] [2021-11-09 08:46:09,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279308018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:09,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123688387] [2021-11-09 08:46:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:46:09,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:09,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:09,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:09,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:46:10,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:46:10,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:10,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:46:10,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2021-11-09 08:46:10,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123688387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:10,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:10,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 08:46:10,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499115468] [2021-11-09 08:46:10,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 08:46:10,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 08:46:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:46:10,864 INFO L87 Difference]: Start difference. First operand 1208 states and 1722 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:11,413 INFO L93 Difference]: Finished difference Result 2877 states and 4102 transitions. [2021-11-09 08:46:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:46:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 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 262 [2021-11-09 08:46:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:11,425 INFO L225 Difference]: With dead ends: 2877 [2021-11-09 08:46:11,425 INFO L226 Difference]: Without dead ends: 1714 [2021-11-09 08:46:11,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:46:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-11-09 08:46:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1260. [2021-11-09 08:46:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 1.426528991262907) internal successors, (1796), 1259 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1796 transitions. [2021-11-09 08:46:11,516 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1796 transitions. Word has length 262 [2021-11-09 08:46:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:11,517 INFO L470 AbstractCegarLoop]: Abstraction has 1260 states and 1796 transitions. [2021-11-09 08:46:11,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:11,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1796 transitions. [2021-11-09 08:46:11,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-09 08:46:11,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:11,524 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:11,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:11,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:46:11,737 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -987028538, now seen corresponding path program 9 times [2021-11-09 08:46:11,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:11,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45654373] [2021-11-09 08:46:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:11,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2021-11-09 08:46:12,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:12,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45654373] [2021-11-09 08:46:12,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45654373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:12,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982876682] [2021-11-09 08:46:12,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:46:12,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:12,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:12,112 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:12,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c847a0-63c5-4691-a215-3e22b0b33e10/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:46:12,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:46:12,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 08:46:12,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:13,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:46:13,202 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:46:13,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:46:13,301 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 08:46:13,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-11-09 08:46:13,491 INFO L354 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2021-11-09 08:46:13,492 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 6 case distinctions, treesize of input 52 treesize of output 57 [2021-11-09 08:46:25,507 INFO L354 Elim1Store]: treesize reduction 118, result has 31.8 percent of original size [2021-11-09 08:46:25,508 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 83 treesize of output 86 [2021-11-09 08:46:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 217 proven. 535 refuted. 0 times theorem prover too weak. 2086 trivial. 0 not checked. [2021-11-09 08:46:25,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982876682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:25,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:25,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 42 [2021-11-09 08:46:25,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26830602] [2021-11-09 08:46:25,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:46:25,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:46:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=1200, Unknown=2, NotChecked=0, Total=1722 [2021-11-09 08:46:25,961 INFO L87 Difference]: Start difference. First operand 1260 states and 1796 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)