./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:22:37,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:22:37,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:22:37,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:22:37,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:22:37,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:22:37,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:22:37,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:22:37,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:22:37,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:22:37,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:22:37,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:22:37,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:22:37,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:22:37,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:22:37,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:22:37,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:22:37,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:22:37,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:22:37,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:22:37,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:22:37,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:22:37,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:22:37,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:22:37,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:22:37,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:22:37,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:22:37,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:22:37,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:22:37,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:22:37,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:22:37,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:22:37,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:22:37,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:22:37,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:22:37,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:22:37,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:22:37,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:22:37,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:22:37,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:22:37,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:22:37,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:22:37,287 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:22:37,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:22:37,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:22:37,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:22:37,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:22:37,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:22:37,303 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:22:37,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:22:37,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:22:37,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:22:37,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:22:37,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:22:37,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:22:37,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:22:37,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:22:37,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:22:37,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:22:37,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:22:37,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:22:37,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:22:37,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:22:37,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:22:37,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:22:37,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:22:37,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:22:37,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:22:37,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:22:37,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:22:37,309 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:22:37,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:22:37,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:22:37,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:22:37,312 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_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2021-11-22 16:22:37,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:22:37,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:22:37,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:22:37,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:22:37,659 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:22:37,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-22 16:22:37,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data/f00b4a6bd/68f0deca88f8471aa0b4c1738cf6dd73/FLAG24e775491 [2021-11-22 16:22:38,235 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:22:38,237 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-22 16:22:38,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data/f00b4a6bd/68f0deca88f8471aa0b4c1738cf6dd73/FLAG24e775491 [2021-11-22 16:22:38,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data/f00b4a6bd/68f0deca88f8471aa0b4c1738cf6dd73 [2021-11-22 16:22:38,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:22:38,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:22:38,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:22:38,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:22:38,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:22:38,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:38,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9d93a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38, skipping insertion in model container [2021-11-22 16:22:38,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:38,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:22:38,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:22:38,836 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-22 16:22:38,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:22:38,875 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:22:38,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-22 16:22:38,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:22:38,934 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:22:38,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38 WrapperNode [2021-11-22 16:22:38,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:22:38,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:22:38,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:22:38,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:22:38,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:38,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:38,996 INFO L137 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2021-11-22 16:22:38,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:22:38,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:22:38,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:22:38,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:22:39,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:39,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:39,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:39,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:39,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:39,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:39,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:39,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:22:39,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:22:39,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:22:39,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:22:39,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (1/1) ... [2021-11-22 16:22:39,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:22:39,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:39,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:22:39,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:22:39,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:22:39,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:22:39,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:22:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 16:22:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:22:39,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:22:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 16:22:39,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:22:39,227 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:22:39,229 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:22:39,447 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:22:39,454 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:22:39,454 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 16:22:39,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:22:39 BoogieIcfgContainer [2021-11-22 16:22:39,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:22:39,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:22:39,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:22:39,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:22:39,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:22:38" (1/3) ... [2021-11-22 16:22:39,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548b728a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:22:39, skipping insertion in model container [2021-11-22 16:22:39,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:22:38" (2/3) ... [2021-11-22 16:22:39,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548b728a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:22:39, skipping insertion in model container [2021-11-22 16:22:39,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:22:39" (3/3) ... [2021-11-22 16:22:39,479 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2021-11-22 16:22:39,485 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:22:39,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:22:39,593 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:22:39,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:22:39,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 16:22:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:22:39,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:39,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:39,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:39,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1098106774, now seen corresponding path program 1 times [2021-11-22 16:22:39,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:39,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068736633] [2021-11-22 16:22:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:39,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:39,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068736633] [2021-11-22 16:22:39,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068736633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:39,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:39,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:22:39,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112535672] [2021-11-22 16:22:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:39,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 16:22:39,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:39,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 16:22:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:22:39,831 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:39,848 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-11-22 16:22:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 16:22:39,850 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-22 16:22:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:39,858 INFO L225 Difference]: With dead ends: 46 [2021-11-22 16:22:39,858 INFO L226 Difference]: Without dead ends: 20 [2021-11-22 16:22:39,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:22:39,864 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:39,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:22:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-22 16:22:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-22 16:22:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-22 16:22:39,896 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2021-11-22 16:22:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:39,896 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-22 16:22:39,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-22 16:22:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:22:39,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:39,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:39,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:22:39,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1395197259, now seen corresponding path program 1 times [2021-11-22 16:22:39,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399338037] [2021-11-22 16:22:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:39,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:39,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:39,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399338037] [2021-11-22 16:22:39,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399338037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:39,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:39,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:22:39,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199398942] [2021-11-22 16:22:39,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:39,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:22:39,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:22:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:22:39,970 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:40,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:40,052 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-22 16:22:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:22:40,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-22 16:22:40,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:40,054 INFO L225 Difference]: With dead ends: 40 [2021-11-22 16:22:40,054 INFO L226 Difference]: Without dead ends: 30 [2021-11-22 16:22:40,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:22:40,057 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:40,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:22:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-22 16:22:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-11-22 16:22:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-22 16:22:40,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2021-11-22 16:22:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:40,089 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-22 16:22:40,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-22 16:22:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:22:40,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:40,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:40,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:22:40,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash 888694178, now seen corresponding path program 1 times [2021-11-22 16:22:40,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:40,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710596761] [2021-11-22 16:22:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:40,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:22:40,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710596761] [2021-11-22 16:22:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710596761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:40,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382498090] [2021-11-22 16:22:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:40,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:40,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:40,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:40,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:22:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:40,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:22:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:22:40,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:22:40,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382498090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:40,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:40,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-22 16:22:40,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356326247] [2021-11-22 16:22:40,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:40,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:22:40,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:22:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:22:40,722 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-11-22 16:22:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:40,887 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-11-22 16:22:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:22:40,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 19 [2021-11-22 16:22:40,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:40,890 INFO L225 Difference]: With dead ends: 76 [2021-11-22 16:22:40,890 INFO L226 Difference]: Without dead ends: 65 [2021-11-22 16:22:40,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:22:40,893 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:40,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 48 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:22:40,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-22 16:22:40,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2021-11-22 16:22:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-11-22 16:22:40,914 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 19 [2021-11-22 16:22:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:40,915 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-11-22 16:22:40,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-11-22 16:22:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-11-22 16:22:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-22 16:22:40,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:40,917 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:40,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:41,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:41,118 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:41,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2033536407, now seen corresponding path program 2 times [2021-11-22 16:22:41,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:41,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116661266] [2021-11-22 16:22:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:41,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 16:22:41,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116661266] [2021-11-22 16:22:41,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116661266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167349519] [2021-11-22 16:22:41,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:22:41,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:41,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:41,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:22:41,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:22:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:41,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:22:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 16:22:41,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 16:22:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167349519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:42,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:42,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-11-22 16:22:42,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244626221] [2021-11-22 16:22:42,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:42,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 16:22:42,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:42,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 16:22:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:22:42,099 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:42,424 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2021-11-22 16:22:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:22:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 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 49 [2021-11-22 16:22:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:42,428 INFO L225 Difference]: With dead ends: 178 [2021-11-22 16:22:42,428 INFO L226 Difference]: Without dead ends: 161 [2021-11-22 16:22:42,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2021-11-22 16:22:42,430 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 279 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:42,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 129 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:22:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-22 16:22:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2021-11-22 16:22:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-11-22 16:22:42,447 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 49 [2021-11-22 16:22:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:42,448 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-11-22 16:22:42,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-11-22 16:22:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-22 16:22:42,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:42,453 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:42,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:42,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:42,681 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash -459873801, now seen corresponding path program 3 times [2021-11-22 16:22:42,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:42,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833443496] [2021-11-22 16:22:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:42,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 16:22:43,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833443496] [2021-11-22 16:22:43,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833443496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10200347] [2021-11-22 16:22:43,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:22:43,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:43,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:43,073 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:43,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:22:45,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 16:22:45,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:22:45,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 16:22:46,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 16:22:46,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10200347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:46,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:46,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2021-11-22 16:22:46,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365840840] [2021-11-22 16:22:46,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:46,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 16:22:46,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 16:22:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 16:22:46,623 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 37 states, 37 states have (on average 6.918918918918919) internal successors, (256), 36 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:47,275 INFO L93 Difference]: Finished difference Result 382 states and 409 transitions. [2021-11-22 16:22:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 16:22:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.918918918918919) internal successors, (256), 36 states have internal predecessors, (256), 0 states have call successors, (0), 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 109 [2021-11-22 16:22:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:47,279 INFO L225 Difference]: With dead ends: 382 [2021-11-22 16:22:47,279 INFO L226 Difference]: Without dead ends: 353 [2021-11-22 16:22:47,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2021-11-22 16:22:47,282 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 881 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:47,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 237 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:22:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-22 16:22:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 232. [2021-11-22 16:22:47,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0129870129870129) internal successors, (234), 231 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2021-11-22 16:22:47,305 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 109 [2021-11-22 16:22:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:47,305 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2021-11-22 16:22:47,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.918918918918919) internal successors, (256), 36 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2021-11-22 16:22:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-22 16:22:47,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:47,316 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:47,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:47,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:47,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash -538289901, now seen corresponding path program 4 times [2021-11-22 16:22:47,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:47,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544198051] [2021-11-22 16:22:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:47,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 0 proven. 1870 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-22 16:22:48,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544198051] [2021-11-22 16:22:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544198051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392596401] [2021-11-22 16:22:48,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:22:48,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:48,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:48,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:48,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:22:48,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:22:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-22 16:22:48,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:48,561 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:22:48,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-22 16:22:48,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 26 [2021-11-22 16:22:49,147 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:49,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:49,328 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:49,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:49,518 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:49,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:49,720 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:49,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:49,906 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:49,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:50,114 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:50,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:50,312 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:50,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:50,498 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:50,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:50,698 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:50,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:50,908 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:50,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:51,116 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:51,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:51,336 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:51,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:51,555 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:51,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:51,785 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:51,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:52,007 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:52,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:52,204 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:52,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:52,410 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:52,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:52,607 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:52,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:52,834 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:52,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-11-22 16:22:53,063 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 16:22:53,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 47 [2021-11-22 16:22:53,219 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-22 16:22:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 59 [2021-11-22 16:22:53,423 INFO L354 Elim1Store]: treesize reduction 101, result has 6.5 percent of original size [2021-11-22 16:22:53,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 68 treesize of output 85 [2021-11-22 16:22:53,659 INFO L354 Elim1Store]: treesize reduction 144, result has 10.6 percent of original size [2021-11-22 16:22:53,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 91 treesize of output 99 [2021-11-22 16:22:54,060 INFO L354 Elim1Store]: treesize reduction 294, result has 8.7 percent of original size [2021-11-22 16:22:54,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 122 treesize of output 145 [2021-11-22 16:22:54,594 INFO L354 Elim1Store]: treesize reduction 492, result has 7.3 percent of original size [2021-11-22 16:22:54,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 3 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 30 case distinctions, treesize of input 156 treesize of output 188 [2021-11-22 16:22:55,376 INFO L354 Elim1Store]: treesize reduction 738, result has 6.3 percent of original size [2021-11-22 16:22:55,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 3 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 190 treesize of output 231 [2021-11-22 16:22:56,379 INFO L354 Elim1Store]: treesize reduction 1032, result has 5.6 percent of original size [2021-11-22 16:22:56,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 3 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 63 case distinctions, treesize of input 224 treesize of output 274 [2021-11-22 16:22:57,730 INFO L354 Elim1Store]: treesize reduction 1374, result has 5.0 percent of original size [2021-11-22 16:22:57,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 23 select indices, 23 select index equivalence classes, 3 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 84 case distinctions, treesize of input 258 treesize of output 317 [2021-11-22 16:23:00,768 INFO L354 Elim1Store]: treesize reduction 1764, result has 4.5 percent of original size [2021-11-22 16:23:00,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 26 select indices, 26 select index equivalence classes, 3 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 108 case distinctions, treesize of input 292 treesize of output 360 [2021-11-22 16:23:22,019 INFO L354 Elim1Store]: treesize reduction 2202, result has 4.1 percent of original size [2021-11-22 16:23:22,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 3 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 135 case distinctions, treesize of input 326 treesize of output 403 [2021-11-22 16:26:09,336 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-22 16:26:09,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-22 16:26:09,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:26:09,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-22 16:26:09,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618116560] [2021-11-22 16:26:09,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:09,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 16:26:09,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 16:26:09,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=798, Invalid=4308, Unknown=6, NotChecked=0, Total=5112 [2021-11-22 16:26:09,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-22 16:26:09,352 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 26 states, 26 states have (on average 7.1923076923076925) internal successors, (187), 25 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 16:26:09,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=798, Invalid=4308, Unknown=6, NotChecked=0, Total=5112 [2021-11-22 16:26:09,373 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:09,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:26:09,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:09,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-22 16:26:09,590 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@6fac9c44 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-22 16:26:09,593 INFO L158 Benchmark]: Toolchain (without parser) took 211004.63ms. Allocated memory was 96.5MB in the beginning and 180.4MB in the end (delta: 83.9MB). Free memory was 56.2MB in the beginning and 104.4MB in the end (delta: -48.2MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB. [2021-11-22 16:26:09,593 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 96.5MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:26:09,594 INFO L158 Benchmark]: CACSL2BoogieTranslator took 345.77ms. Allocated memory is still 96.5MB. Free memory was 56.0MB in the beginning and 72.1MB in the end (delta: -16.0MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2021-11-22 16:26:09,594 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.65ms. Allocated memory is still 96.5MB. Free memory was 72.1MB in the beginning and 70.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:26:09,594 INFO L158 Benchmark]: Boogie Preprocessor took 50.48ms. Allocated memory is still 96.5MB. Free memory was 70.5MB in the beginning and 69.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:26:09,595 INFO L158 Benchmark]: RCFGBuilder took 408.06ms. Allocated memory is still 96.5MB. Free memory was 69.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 16:26:09,595 INFO L158 Benchmark]: TraceAbstraction took 210134.34ms. Allocated memory was 96.5MB in the beginning and 180.4MB in the end (delta: 83.9MB). Free memory was 58.2MB in the beginning and 104.4MB in the end (delta: -46.2MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. [2021-11-22 16:26:09,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 96.5MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 345.77ms. Allocated memory is still 96.5MB. Free memory was 56.0MB in the beginning and 72.1MB in the end (delta: -16.0MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.65ms. Allocated memory is still 96.5MB. Free memory was 72.1MB in the beginning and 70.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.48ms. Allocated memory is still 96.5MB. Free memory was 70.5MB in the beginning and 69.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 408.06ms. Allocated memory is still 96.5MB. Free memory was 69.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 210134.34ms. Allocated memory was 96.5MB in the beginning and 180.4MB in the end (delta: 83.9MB). Free memory was 58.2MB in the beginning and 104.4MB in the end (delta: -46.2MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@6fac9c44 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@6fac9c44: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:26:12,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:26:12,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:26:12,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:26:12,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:26:12,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:26:12,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:26:12,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:26:12,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:26:12,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:26:12,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:26:12,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:26:12,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:26:12,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:26:12,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:26:12,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:26:12,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:26:12,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:26:12,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:26:12,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:26:12,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:26:12,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:26:12,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:26:12,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:26:12,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:26:12,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:26:12,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:26:12,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:26:12,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:26:12,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:26:12,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:26:12,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:26:12,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:26:12,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:26:12,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:26:12,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:26:12,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:26:12,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:26:12,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:26:12,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:26:12,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:26:12,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-22 16:26:12,161 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:26:12,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:26:12,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:26:12,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:26:12,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:26:12,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:26:12,165 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:26:12,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:26:12,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:26:12,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:26:12,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:26:12,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:26:12,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:26:12,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:26:12,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:26:12,169 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 16:26:12,169 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 16:26:12,169 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:26:12,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:26:12,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:26:12,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:26:12,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:26:12,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:26:12,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:26:12,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:26:12,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:26:12,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:26:12,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:26:12,173 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 16:26:12,173 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 16:26:12,173 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:26:12,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:26:12,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:26:12,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:26:12,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 16:26:12,175 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2021-11-22 16:26:12,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:26:12,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:26:12,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:26:12,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:26:12,648 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:26:12,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-22 16:26:12,721 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data/0db20c59d/d3be437162514167b5098e44994fd45f/FLAGdf8a164d2 [2021-11-22 16:26:13,331 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:26:13,331 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-11-22 16:26:13,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data/0db20c59d/d3be437162514167b5098e44994fd45f/FLAGdf8a164d2 [2021-11-22 16:26:13,662 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/data/0db20c59d/d3be437162514167b5098e44994fd45f [2021-11-22 16:26:13,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:26:13,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:26:13,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:26:13,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:26:13,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:26:13,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:13,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bda3c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13, skipping insertion in model container [2021-11-22 16:26:13,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:13,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:26:13,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:26:13,860 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-22 16:26:13,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:26:13,892 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:26:13,907 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-11-22 16:26:13,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:26:13,933 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:26:13,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13 WrapperNode [2021-11-22 16:26:13,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:26:13,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:26:13,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:26:13,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:26:13,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:13,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:13,978 INFO L137 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 84 [2021-11-22 16:26:13,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:26:13,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:26:13,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:26:13,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:26:13,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:13,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:13,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:13,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:14,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:14,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:14,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:14,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:26:14,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:26:14,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:26:14,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:26:14,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (1/1) ... [2021-11-22 16:26:14,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:26:14,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:14,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:26:14,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:26:14,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:26:14,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 16:26:14,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:26:14,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-22 16:26:14,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:26:14,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:26:14,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:26:14,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-22 16:26:14,207 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:26:14,208 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:26:14,474 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:26:14,480 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:26:14,480 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 16:26:14,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:26:14 BoogieIcfgContainer [2021-11-22 16:26:14,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:26:14,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:26:14,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:26:14,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:26:14,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:26:13" (1/3) ... [2021-11-22 16:26:14,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7d48d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:26:14, skipping insertion in model container [2021-11-22 16:26:14,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:26:13" (2/3) ... [2021-11-22 16:26:14,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7d48d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:26:14, skipping insertion in model container [2021-11-22 16:26:14,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:26:14" (3/3) ... [2021-11-22 16:26:14,490 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2021-11-22 16:26:14,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:26:14,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:26:14,543 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:26:14,551 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:26:14,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 16:26:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:26:14,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:14,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:14,595 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:26:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1098106774, now seen corresponding path program 1 times [2021-11-22 16:26:14,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:26:14,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501904358] [2021-11-22 16:26:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:14,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:26:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:26:14,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:26:14,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 16:26:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:14,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-22 16:26:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:26:14,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:26:14,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:26:14,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501904358] [2021-11-22 16:26:14,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501904358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:26:14,828 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:26:14,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 16:26:14,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116859865] [2021-11-22 16:26:14,831 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:26:14,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 16:26:14,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:26:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 16:26:14,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:26:14,885 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:14,906 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-11-22 16:26:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 16:26:14,909 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-22 16:26:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:14,919 INFO L225 Difference]: With dead ends: 46 [2021-11-22 16:26:14,919 INFO L226 Difference]: Without dead ends: 20 [2021-11-22 16:26:14,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:26:14,928 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:14,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:26:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-22 16:26:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-22 16:26:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-22 16:26:14,972 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2021-11-22 16:26:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:14,972 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-22 16:26:14,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-22 16:26:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:26:14,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:14,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:14,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:15,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:26:15,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:26:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1395197259, now seen corresponding path program 1 times [2021-11-22 16:26:15,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:26:15,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238928573] [2021-11-22 16:26:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:15,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:26:15,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:26:15,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:26:15,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 16:26:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:15,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:26:15,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:26:15,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:26:15,380 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:26:15,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238928573] [2021-11-22 16:26:15,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238928573] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:26:15,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:26:15,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 16:26:15,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25004377] [2021-11-22 16:26:15,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:26:15,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:26:15,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:26:15,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:26:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:26:15,385 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:15,559 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-22 16:26:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:26:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-22 16:26:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:15,561 INFO L225 Difference]: With dead ends: 43 [2021-11-22 16:26:15,561 INFO L226 Difference]: Without dead ends: 33 [2021-11-22 16:26:15,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:26:15,563 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:15,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 21 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:26:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-22 16:26:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-11-22 16:26:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-11-22 16:26:15,576 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 9 [2021-11-22 16:26:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:15,577 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-11-22 16:26:15,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-11-22 16:26:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 16:26:15,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:15,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:15,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:15,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:26:15,792 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:26:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 595210895, now seen corresponding path program 1 times [2021-11-22 16:26:15,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:26:15,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119649384] [2021-11-22 16:26:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:15,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:26:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:26:15,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:26:15,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 16:26:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:26:15,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:26:16,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:26:16,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:26:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119649384] [2021-11-22 16:26:16,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119649384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:16,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:26:16,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-22 16:26:16,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816736781] [2021-11-22 16:26:16,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:16,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:26:16,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:26:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:26:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:26:16,511 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:16,948 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-11-22 16:26:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:26:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-22 16:26:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:16,951 INFO L225 Difference]: With dead ends: 110 [2021-11-22 16:26:16,951 INFO L226 Difference]: Without dead ends: 97 [2021-11-22 16:26:16,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:26:16,954 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 216 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:16,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 90 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:26:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-22 16:26:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2021-11-22 16:26:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-22 16:26:16,987 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 29 [2021-11-22 16:26:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:16,988 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-22 16:26:16,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-22 16:26:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 16:26:16,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:16,995 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:17,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:17,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:26:17,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:26:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1815086525, now seen corresponding path program 2 times [2021-11-22 16:26:17,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:26:17,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232028628] [2021-11-22 16:26:17,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:26:17,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:26:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:26:17,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:26:17,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 16:26:17,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:26:17,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 16:26:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 16:26:18,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 16:26:18,695 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:26:18,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232028628] [2021-11-22 16:26:18,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232028628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:18,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:26:18,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-22 16:26:18,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803027785] [2021-11-22 16:26:18,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:18,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 16:26:18,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:26:18,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 16:26:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:26:18,698 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:20,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:20,386 INFO L93 Difference]: Finished difference Result 246 states and 265 transitions. [2021-11-22 16:26:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 16:26:20,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-22 16:26:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:20,391 INFO L225 Difference]: With dead ends: 246 [2021-11-22 16:26:20,392 INFO L226 Difference]: Without dead ends: 225 [2021-11-22 16:26:20,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-11-22 16:26:20,394 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 591 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:20,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 470 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 16:26:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-22 16:26:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 152. [2021-11-22 16:26:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2021-11-22 16:26:20,440 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 69 [2021-11-22 16:26:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:20,441 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2021-11-22 16:26:20,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2021-11-22 16:26:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-22 16:26:20,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:20,450 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:20,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:20,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:26:20,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:26:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash -737482325, now seen corresponding path program 3 times [2021-11-22 16:26:20,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:26:20,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268193936] [2021-11-22 16:26:20,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:26:20,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:26:20,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:26:20,668 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:26:20,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 16:26:21,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-22 16:26:21,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-22 16:26:21,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-22 16:26:22,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-22 16:26:24,608 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:26:24,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268193936] [2021-11-22 16:26:24,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268193936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:24,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:26:24,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-11-22 16:26:24,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315615558] [2021-11-22 16:26:24,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:24,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-22 16:26:24,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:26:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-22 16:26:24,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 16:26:24,612 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 34 states, 34 states have (on average 7.0) internal successors, (238), 33 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:30,855 INFO L93 Difference]: Finished difference Result 518 states and 553 transitions. [2021-11-22 16:26:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-22 16:26:30,856 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 7.0) internal successors, (238), 33 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-22 16:26:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:30,861 INFO L225 Difference]: With dead ends: 518 [2021-11-22 16:26:30,861 INFO L226 Difference]: Without dead ends: 481 [2021-11-22 16:26:30,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 16:26:30,865 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 2357 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2357 SdHoareTripleChecker+Valid, 2094 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:30,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2357 Valid, 2094 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-22 16:26:30,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-22 16:26:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 312. [2021-11-22 16:26:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.0096463022508038) internal successors, (314), 311 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 314 transitions. [2021-11-22 16:26:30,896 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 314 transitions. Word has length 149 [2021-11-22 16:26:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:30,897 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 314 transitions. [2021-11-22 16:26:30,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.0) internal successors, (238), 33 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 314 transitions. [2021-11-22 16:26:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-22 16:26:30,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:30,903 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:30,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:31,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:26:31,123 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:26:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 156125307, now seen corresponding path program 4 times [2021-11-22 16:26:31,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:26:31,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329060657] [2021-11-22 16:26:31,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:26:31,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:26:31,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:26:31,128 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:26:31,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 16:26:31,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:26:31,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-22 16:26:31,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 0 proven. 3510 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-22 16:26:33,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 0 proven. 3510 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-22 16:26:37,819 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:26:37,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329060657] [2021-11-22 16:26:37,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329060657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:37,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:26:37,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2021-11-22 16:26:37,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981998979] [2021-11-22 16:26:37,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-22 16:26:37,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:26:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-22 16:26:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2021-11-22 16:26:37,826 INFO L87 Difference]: Start difference. First operand 312 states and 314 transitions. Second operand has 66 states, 66 states have (on average 7.484848484848484) internal successors, (494), 65 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:07,479 INFO L93 Difference]: Finished difference Result 1062 states and 1129 transitions. [2021-11-22 16:27:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-22 16:27:07,480 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 7.484848484848484) internal successors, (494), 65 states have internal predecessors, (494), 0 states have call successors, (0), 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 309 [2021-11-22 16:27:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:07,486 INFO L225 Difference]: With dead ends: 1062 [2021-11-22 16:27:07,487 INFO L226 Difference]: Without dead ends: 993 [2021-11-22 16:27:07,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=3199, Invalid=6113, Unknown=0, NotChecked=0, Total=9312 [2021-11-22 16:27:07,493 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 7275 mSDsluCounter, 8520 mSDsCounter, 0 mSdLazyCounter, 7070 mSolverCounterSat, 2308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7275 SdHoareTripleChecker+Valid, 8798 SdHoareTripleChecker+Invalid, 9378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2308 IncrementalHoareTripleChecker+Valid, 7070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:07,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7275 Valid, 8798 Invalid, 9378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2308 Valid, 7070 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2021-11-22 16:27:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-11-22 16:27:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 632. [2021-11-22 16:27:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 1.0047543581616483) internal successors, (634), 631 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 634 transitions. [2021-11-22 16:27:07,531 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 634 transitions. Word has length 309 [2021-11-22 16:27:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:07,532 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 634 transitions. [2021-11-22 16:27:07,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 7.484848484848484) internal successors, (494), 65 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 634 transitions. [2021-11-22 16:27:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-11-22 16:27:07,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:07,546 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:07,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:07,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:27:07,773 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:27:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:07,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1148516837, now seen corresponding path program 5 times [2021-11-22 16:27:07,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:27:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946961331] [2021-11-22 16:27:07,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:27:07,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:27:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:27:07,776 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:27:07,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 16:29:00,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2021-11-22 16:29:00,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:29:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-22 16:29:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:29:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19034 backedges. 0 proven. 15190 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2021-11-22 16:29:06,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:29:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19034 backedges. 0 proven. 15190 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2021-11-22 16:29:22,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:29:22,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946961331] [2021-11-22 16:29:22,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946961331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:29:22,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:29:22,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 130 [2021-11-22 16:29:22,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203249437] [2021-11-22 16:29:22,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:29:22,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-22 16:29:22,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:29:22,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-22 16:29:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4419, Invalid=12611, Unknown=0, NotChecked=0, Total=17030 [2021-11-22 16:29:22,893 INFO L87 Difference]: Start difference. First operand 632 states and 634 transitions. Second operand has 131 states, 131 states have (on average 7.679389312977099) internal successors, (1006), 130 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:33:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:33:13,792 INFO L93 Difference]: Finished difference Result 2150 states and 2281 transitions. [2021-11-22 16:33:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-22 16:33:13,794 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 7.679389312977099) internal successors, (1006), 130 states have internal predecessors, (1006), 0 states have call successors, (0), 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 629 [2021-11-22 16:33:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:33:13,806 INFO L225 Difference]: With dead ends: 2150 [2021-11-22 16:33:13,806 INFO L226 Difference]: Without dead ends: 2017 [2021-11-22 16:33:13,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1320 GetRequests, 1127 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6233 ImplicationChecksByTransitivity, 199.3s TimeCoverageRelationStatistics Valid=12795, Invalid=25035, Unknown=0, NotChecked=0, Total=37830 [2021-11-22 16:33:13,820 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 29675 mSDsluCounter, 35464 mSDsCounter, 0 mSdLazyCounter, 28366 mSolverCounterSat, 9444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29675 SdHoareTripleChecker+Valid, 36030 SdHoareTripleChecker+Invalid, 37810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 9444 IncrementalHoareTripleChecker+Valid, 28366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:33:13,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29675 Valid, 36030 Invalid, 37810 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [9444 Valid, 28366 Invalid, 0 Unknown, 0 Unchecked, 43.6s Time] [2021-11-22 16:33:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-11-22 16:33:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1272. [2021-11-22 16:33:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 1.002360346184107) internal successors, (1274), 1271 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:33:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1274 transitions. [2021-11-22 16:33:13,868 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1274 transitions. Word has length 629 [2021-11-22 16:33:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:33:13,869 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1274 transitions. [2021-11-22 16:33:13,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 7.679389312977099) internal successors, (1006), 130 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:33:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1274 transitions. [2021-11-22 16:33:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1270 [2021-11-22 16:33:13,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:33:13,932 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:33:14,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:33:14,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:33:14,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:33:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:33:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash -488865445, now seen corresponding path program 6 times [2021-11-22 16:33:14,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:33:14,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702505334] [2021-11-22 16:33:14,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:33:14,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:33:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:33:14,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:33:14,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_149d3344-4422-49a1-a945-a36736fd6a8d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process