./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:28:55,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:28:55,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:28:55,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:28:55,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:28:55,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:28:55,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:28:55,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:28:55,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:28:55,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:28:55,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:28:55,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:28:55,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:28:55,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:28:55,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:28:55,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:28:55,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:28:55,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:28:55,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:28:55,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:28:55,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:28:55,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:28:55,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:28:55,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:28:55,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:28:55,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:28:55,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:28:55,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:28:55,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:28:55,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:28:55,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:28:55,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:28:55,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:28:55,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:28:55,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:28:55,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:28:55,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:28:55,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:28:55,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:28:55,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:28:55,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:28:55,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:28:55,838 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:28:55,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:28:55,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:28:55,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:28:55,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:28:55,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:28:55,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:28:55,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:28:55,845 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:28:55,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:28:55,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:28:55,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:28:55,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:28:55,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:28:55,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:28:55,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:28:55,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:28:55,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:28:55,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:28:55,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:28:55,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:28:55,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:28:55,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:28:55,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:28:55,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:28:55,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:28:55,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:28:55,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:28:55,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:28:55,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:28:55,852 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:28:55,852 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:28:55,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:28:55,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:28:55,853 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca [2021-12-15 08:28:56,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:28:56,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:28:56,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:28:56,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:28:56,106 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:28:56,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2021-12-15 08:28:56,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbe15bd9/4bc8ac061a7d43eda1d1e95c5d10d016/FLAG63e3c6cc8 [2021-12-15 08:28:56,602 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:28:56,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2021-12-15 08:28:56,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbe15bd9/4bc8ac061a7d43eda1d1e95c5d10d016/FLAG63e3c6cc8 [2021-12-15 08:28:56,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbe15bd9/4bc8ac061a7d43eda1d1e95c5d10d016 [2021-12-15 08:28:56,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:28:57,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:28:57,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:28:57,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:28:57,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:28:57,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:28:56" (1/1) ... [2021-12-15 08:28:57,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d1811ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57, skipping insertion in model container [2021-12-15 08:28:57,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:28:56" (1/1) ... [2021-12-15 08:28:57,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:28:57,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:28:57,211 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2021-12-15 08:28:57,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:28:57,239 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:28:57,251 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2021-12-15 08:28:57,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:28:57,281 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:28:57,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57 WrapperNode [2021-12-15 08:28:57,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:28:57,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:28:57,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:28:57,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:28:57,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,315 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2021-12-15 08:28:57,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:28:57,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:28:57,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:28:57,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:28:57,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:28:57,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:28:57,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:28:57,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:28:57,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (1/1) ... [2021-12-15 08:28:57,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:28:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:28:57,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:28:57,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:28:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:28:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:28:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:28:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:28:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:28:57,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:28:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:28:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:28:57,500 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:28:57,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:28:57,652 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:28:57,670 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:28:57,683 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 08:28:57,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:28:57 BoogieIcfgContainer [2021-12-15 08:28:57,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:28:57,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:28:57,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:28:57,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:28:57,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:28:56" (1/3) ... [2021-12-15 08:28:57,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a01eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:28:57, skipping insertion in model container [2021-12-15 08:28:57,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:28:57" (2/3) ... [2021-12-15 08:28:57,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a01eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:28:57, skipping insertion in model container [2021-12-15 08:28:57,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:28:57" (3/3) ... [2021-12-15 08:28:57,692 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2021-12-15 08:28:57,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:28:57,711 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:28:57,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:28:57,775 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:28:57,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:28:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 08:28:57,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:28:57,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:28:57,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:28:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:28:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2021-12-15 08:28:57,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:28:57,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118566475] [2021-12-15 08:28:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:28:57,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:28:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:28:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:28:57,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:28:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118566475] [2021-12-15 08:28:57,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118566475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:28:57,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:28:57,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:28:57,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235247206] [2021-12-15 08:28:57,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:28:57,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:28:57,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:28:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:28:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:28:58,001 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:28:58,036 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-15 08:28:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:28:58,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-15 08:28:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:28:58,045 INFO L225 Difference]: With dead ends: 40 [2021-12-15 08:28:58,046 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 08:28:58,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:28:58,051 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:28:58,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:28:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 08:28:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-12-15 08:28:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-15 08:28:58,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-12-15 08:28:58,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:28:58,087 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-15 08:28:58,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-15 08:28:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:28:58,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:28:58,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:28:58,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:28:58,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:28:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:28:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2021-12-15 08:28:58,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:28:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10788751] [2021-12-15 08:28:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:28:58,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:28:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:28:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:28:58,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:28:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10788751] [2021-12-15 08:28:58,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10788751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:28:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733577570] [2021-12-15 08:28:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:28:58,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:28:58,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:28:58,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:28:58,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:28:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:28:58,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 08:28:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:28:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:28:58,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:28:58,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733577570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:28:58,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:28:58,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 08:28:58,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046295971] [2021-12-15 08:28:58,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:28:58,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:28:58,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:28:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:28:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:28:58,319 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:28:58,348 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-12-15 08:28:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:28:58,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:28:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:28:58,349 INFO L225 Difference]: With dead ends: 32 [2021-12-15 08:28:58,349 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 08:28:58,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:28:58,351 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:28:58,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:28:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 08:28:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-15 08:28:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-15 08:28:58,355 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2021-12-15 08:28:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:28:58,356 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-15 08:28:58,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-15 08:28:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 08:28:58,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:28:58,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:28:58,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:28:58,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:28:58,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:28:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:28:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2021-12-15 08:28:58,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:28:58,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499711222] [2021-12-15 08:28:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:28:58,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:28:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:28:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:28:58,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:28:58,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499711222] [2021-12-15 08:28:58,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499711222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:28:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213844697] [2021-12-15 08:28:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:28:58,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:28:58,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:28:58,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:28:58,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:28:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:28:58,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:28:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:28:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:28:58,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:28:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:28:58,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213844697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:28:58,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:28:58,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 08:28:58,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908967121] [2021-12-15 08:28:58,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:28:58,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:28:58,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:28:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:28:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:28:58,881 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2021-12-15 08:28:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:28:58,904 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-12-15 08:28:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:28:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) Word has length 17 [2021-12-15 08:28:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:28:58,905 INFO L225 Difference]: With dead ends: 41 [2021-12-15 08:28:58,906 INFO L226 Difference]: Without dead ends: 26 [2021-12-15 08:28:58,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:28:58,907 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:28:58,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:28:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-15 08:28:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-15 08:28:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-15 08:28:58,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2021-12-15 08:28:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:28:58,913 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-15 08:28:58,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2021-12-15 08:28:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-15 08:28:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 08:28:58,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:28:58,914 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:28:58,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:28:59,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-15 08:28:59,129 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:28:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:28:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash 862458255, now seen corresponding path program 2 times [2021-12-15 08:28:59,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:28:59,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308431921] [2021-12-15 08:28:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:28:59,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:28:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:28:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:28:59,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:28:59,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308431921] [2021-12-15 08:28:59,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308431921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:28:59,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617349217] [2021-12-15 08:28:59,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:28:59,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:28:59,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:28:59,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:28:59,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:28:59,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:28:59,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:28:59,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:28:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:28:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:28:59,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:28:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:28:59,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617349217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:28:59,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:28:59,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 08:28:59,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659861569] [2021-12-15 08:28:59,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:28:59,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:28:59,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:28:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:28:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:28:59,392 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:28:59,459 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-12-15 08:28:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:28:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 08:28:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:28:59,462 INFO L225 Difference]: With dead ends: 49 [2021-12-15 08:28:59,462 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 08:28:59,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:28:59,467 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:28:59,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:28:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 08:28:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-15 08:28:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-12-15 08:28:59,481 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2021-12-15 08:28:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:28:59,481 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-12-15 08:28:59,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:28:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-12-15 08:28:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 08:28:59,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:28:59,483 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:28:59,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:28:59,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:28:59,684 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:28:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:28:59,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1441156285, now seen corresponding path program 3 times [2021-12-15 08:28:59,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:28:59,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192298176] [2021-12-15 08:28:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:28:59,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:28:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:28:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 08:28:59,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:28:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192298176] [2021-12-15 08:28:59,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192298176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:28:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291259611] [2021-12-15 08:28:59,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:28:59,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:28:59,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:28:59,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:28:59,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:28:59,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 08:28:59,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:28:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:28:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:28:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 08:28:59,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:29:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 08:29:00,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291259611] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:29:00,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:29:00,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-15 08:29:00,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432372243] [2021-12-15 08:29:00,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:29:00,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 08:29:00,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:29:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 08:29:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:29:00,123 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:29:00,175 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-15 08:29:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:29:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-15 08:29:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:29:00,176 INFO L225 Difference]: With dead ends: 77 [2021-12-15 08:29:00,176 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 08:29:00,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:29:00,178 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:29:00,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:29:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 08:29:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-15 08:29:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-12-15 08:29:00,184 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2021-12-15 08:29:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:29:00,184 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-12-15 08:29:00,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-12-15 08:29:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 08:29:00,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:29:00,187 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:29:00,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 08:29:00,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:00,391 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:29:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:29:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash -100034249, now seen corresponding path program 4 times [2021-12-15 08:29:00,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:29:00,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350863572] [2021-12-15 08:29:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:29:00,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:29:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:29:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 08:29:00,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:29:00,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350863572] [2021-12-15 08:29:00,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350863572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:29:00,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315896650] [2021-12-15 08:29:00,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:29:00,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:00,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:29:00,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:29:00,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:29:00,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:29:00,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:29:00,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 08:29:00,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:29:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 08:29:00,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:29:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 08:29:01,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315896650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:29:01,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:29:01,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-15 08:29:01,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777069506] [2021-12-15 08:29:01,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:29:01,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 08:29:01,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:29:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 08:29:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:29:01,041 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:29:01,115 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2021-12-15 08:29:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 08:29:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 08:29:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:29:01,123 INFO L225 Difference]: With dead ends: 101 [2021-12-15 08:29:01,123 INFO L226 Difference]: Without dead ends: 74 [2021-12-15 08:29:01,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:29:01,125 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:29:01,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:29:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-15 08:29:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-15 08:29:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-12-15 08:29:01,143 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 47 [2021-12-15 08:29:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:29:01,144 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-12-15 08:29:01,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-12-15 08:29:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 08:29:01,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:29:01,145 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:29:01,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-15 08:29:01,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:01,356 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:29:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:29:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash -888767713, now seen corresponding path program 5 times [2021-12-15 08:29:01,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:29:01,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338040058] [2021-12-15 08:29:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:29:01,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:29:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:29:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 08:29:01,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:29:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338040058] [2021-12-15 08:29:01,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338040058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:29:01,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389033316] [2021-12-15 08:29:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:29:01,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:01,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:29:01,708 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:29:01,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:29:11,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-15 08:29:11,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:29:11,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:29:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:29:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-12-15 08:29:11,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:29:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-12-15 08:29:11,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389033316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:29:11,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:29:11,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2021-12-15 08:29:11,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641678458] [2021-12-15 08:29:11,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:29:11,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 08:29:11,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:29:11,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 08:29:11,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 08:29:11,574 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:11,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:29:11,738 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2021-12-15 08:29:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-15 08:29:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 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 71 [2021-12-15 08:29:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:29:11,743 INFO L225 Difference]: With dead ends: 128 [2021-12-15 08:29:11,743 INFO L226 Difference]: Without dead ends: 101 [2021-12-15 08:29:11,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 08:29:11,745 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:29:11,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 68 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:29:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-15 08:29:11,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-12-15 08:29:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-12-15 08:29:11,764 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 71 [2021-12-15 08:29:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:29:11,764 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-12-15 08:29:11,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-12-15 08:29:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 08:29:11,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:29:11,770 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:29:11,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:29:11,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:11,971 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:29:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:29:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2043147451, now seen corresponding path program 6 times [2021-12-15 08:29:11,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:29:11,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087093579] [2021-12-15 08:29:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:29:11,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:29:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:29:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-15 08:29:12,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:29:12,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087093579] [2021-12-15 08:29:12,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087093579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:29:12,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090679969] [2021-12-15 08:29:12,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:29:12,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:12,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:29:12,379 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:29:12,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:29:33,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-15 08:29:33,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:29:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 08:29:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:29:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-12-15 08:29:34,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:29:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-12-15 08:29:34,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090679969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:29:34,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:29:34,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 48 [2021-12-15 08:29:34,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929274467] [2021-12-15 08:29:34,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:29:34,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-15 08:29:34,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:29:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-15 08:29:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 08:29:34,424 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:29:34,673 INFO L93 Difference]: Finished difference Result 202 states and 232 transitions. [2021-12-15 08:29:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-15 08:29:34,674 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-15 08:29:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:29:34,675 INFO L225 Difference]: With dead ends: 202 [2021-12-15 08:29:34,675 INFO L226 Difference]: Without dead ends: 151 [2021-12-15 08:29:34,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 08:29:34,677 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:29:34,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 86 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:29:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-15 08:29:34,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-12-15 08:29:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2021-12-15 08:29:34,686 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 97 [2021-12-15 08:29:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:29:34,686 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2021-12-15 08:29:34,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2021-12-15 08:29:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-15 08:29:34,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:29:34,688 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:29:34,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:29:34,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:34,912 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:29:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:29:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 163678547, now seen corresponding path program 7 times [2021-12-15 08:29:34,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:29:34,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670958488] [2021-12-15 08:29:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:29:34,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:29:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:29:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-12-15 08:29:35,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:29:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670958488] [2021-12-15 08:29:35,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670958488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:29:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372300531] [2021-12-15 08:29:35,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:29:35,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:29:35,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:29:35,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:29:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:29:35,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 08:29:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:29:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-12-15 08:29:35,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:29:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-12-15 08:29:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372300531] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:29:36,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:29:36,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-12-15 08:29:36,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855601813] [2021-12-15 08:29:36,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:29:36,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-15 08:29:36,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:29:36,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-15 08:29:36,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 08:29:36,737 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:29:36,885 INFO L93 Difference]: Finished difference Result 301 states and 332 transitions. [2021-12-15 08:29:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-15 08:29:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 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 147 [2021-12-15 08:29:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:29:36,888 INFO L225 Difference]: With dead ends: 301 [2021-12-15 08:29:36,888 INFO L226 Difference]: Without dead ends: 202 [2021-12-15 08:29:36,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 08:29:36,892 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:29:36,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 82 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:29:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-15 08:29:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-15 08:29:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0199004975124377) internal successors, (205), 201 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2021-12-15 08:29:36,901 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 147 [2021-12-15 08:29:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:29:36,901 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2021-12-15 08:29:36,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2021-12-15 08:29:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-15 08:29:36,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:29:36,904 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:29:36,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:29:37,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 08:29:37,122 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:29:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:29:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash -776127201, now seen corresponding path program 8 times [2021-12-15 08:29:37,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:29:37,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126031643] [2021-12-15 08:29:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:29:37,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:29:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:29:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-12-15 08:29:38,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:29:38,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126031643] [2021-12-15 08:29:38,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126031643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:29:38,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268103194] [2021-12-15 08:29:38,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:29:38,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:38,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:29:38,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:29:38,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:29:38,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:29:38,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:29:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 08:29:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:29:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-12-15 08:29:38,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:29:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-12-15 08:29:41,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268103194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:29:41,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:29:41,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-12-15 08:29:41,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734876263] [2021-12-15 08:29:41,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:29:41,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-15 08:29:41,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:29:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-15 08:29:41,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-15 08:29:41,382 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:29:41,659 INFO L93 Difference]: Finished difference Result 405 states and 462 transitions. [2021-12-15 08:29:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-15 08:29:41,660 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 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 199 [2021-12-15 08:29:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:29:41,661 INFO L225 Difference]: With dead ends: 405 [2021-12-15 08:29:41,661 INFO L226 Difference]: Without dead ends: 306 [2021-12-15 08:29:41,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-12-15 08:29:41,664 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:29:41,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 82 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:29:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-15 08:29:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2021-12-15 08:29:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 305 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 309 transitions. [2021-12-15 08:29:41,673 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 309 transitions. Word has length 199 [2021-12-15 08:29:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:29:41,674 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 309 transitions. [2021-12-15 08:29:41,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:29:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 309 transitions. [2021-12-15 08:29:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-15 08:29:41,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:29:41,677 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:29:41,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:29:41,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 08:29:41,888 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:29:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:29:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash -148538697, now seen corresponding path program 9 times [2021-12-15 08:29:41,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:29:41,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768131126] [2021-12-15 08:29:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:29:41,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:29:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:29:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-12-15 08:29:45,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:29:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768131126] [2021-12-15 08:29:45,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768131126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:29:45,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81147574] [2021-12-15 08:29:45,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:29:45,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:29:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:29:45,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:29:45,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process