./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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-fpi/eqn4.c -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 30192b5b0c1eb564e0de6a5c7a5fdad0c55c7aa4 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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-fpi/eqn4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 30192b5b0c1eb564e0de6a5c7a5fdad0c55c7aa4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 19:05:05,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:05:05,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:05:05,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:05:05,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:05:05,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:05:05,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:05:05,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:05:05,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:05:05,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:05:05,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:05:05,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:05:05,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:05:05,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:05:05,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:05:05,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:05:05,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:05:05,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:05:05,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:05:05,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:05:05,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:05:05,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:05:05,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:05:05,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:05:05,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:05:05,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:05:05,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:05:05,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:05:05,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:05:05,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:05:05,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:05:05,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:05:05,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:05:05,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:05:05,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:05:05,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:05:05,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:05:05,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:05:05,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:05:05,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:05:05,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:05:05,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:05:05,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:05:05,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:05:05,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:05:05,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:05:05,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:05:05,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:05:05,681 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:05:05,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:05:05,682 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:05:05,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:05:05,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:05:05,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:05:05,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:05:05,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:05:05,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:05:05,684 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:05:05,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:05:05,684 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:05:05,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:05:05,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:05:05,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:05:05,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:05:05,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:05:05,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:05:05,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:05:05,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:05:05,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:05:05,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:05:05,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:05:05,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:05:05,687 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30192b5b0c1eb564e0de6a5c7a5fdad0c55c7aa4 [2021-08-25 19:05:06,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:05:06,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:05:06,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:05:06,032 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:05:06,033 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:05:06,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4.c [2021-08-25 19:05:06,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9c329c99/2d65198042e540fa8b533c8de14da67e/FLAG4f246dd29 [2021-08-25 19:05:06,566 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:05:06,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c [2021-08-25 19:05:06,574 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9c329c99/2d65198042e540fa8b533c8de14da67e/FLAG4f246dd29 [2021-08-25 19:05:06,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9c329c99/2d65198042e540fa8b533c8de14da67e [2021-08-25 19:05:07,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:05:07,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:05:07,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:07,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:05:07,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:05:07,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:05:06" (1/1) ... [2021-08-25 19:05:07,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550db4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07, skipping insertion in model container [2021-08-25 19:05:07,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:05:06" (1/1) ... [2021-08-25 19:05:07,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:05:07,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:05:07,159 WARN L228 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-fpi/eqn4.c[587,600] [2021-08-25 19:05:07,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:07,179 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:05:07,189 WARN L228 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-fpi/eqn4.c[587,600] [2021-08-25 19:05:07,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:07,208 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:05:07,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07 WrapperNode [2021-08-25 19:05:07,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:07,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:07,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:05:07,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:05:07,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:07,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:05:07,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:05:07,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:05:07,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:05:07,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:05:07,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:05:07,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:05:07,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (1/1) ... [2021-08-25 19:05:07,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:05:07,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:07,329 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) [2021-08-25 19:05:07,331 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 [2021-08-25 19:05:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:05:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:05:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:05:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:05:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:05:07,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:05:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:05:07,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:05:07,617 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:05:07,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:07 BoogieIcfgContainer [2021-08-25 19:05:07,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:05:07,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:05:07,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:05:07,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:05:07,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:05:06" (1/3) ... [2021-08-25 19:05:07,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21268e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:07, skipping insertion in model container [2021-08-25 19:05:07,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:07" (2/3) ... [2021-08-25 19:05:07,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21268e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:07, skipping insertion in model container [2021-08-25 19:05:07,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:07" (3/3) ... [2021-08-25 19:05:07,625 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn4.c [2021-08-25 19:05:07,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:05:07,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:05:07,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:05:07,678 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-25 19:05:07,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:05:07,690 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) [2021-08-25 19:05:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:07,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:07,695 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:07,696 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:05:07,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:07,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405552549] [2021-08-25 19:05:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:07,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:07,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:07,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405552549] [2021-08-25 19:05:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405552549] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:07,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:07,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:05:07,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73211767] [2021-08-25 19:05:07,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:05:07,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:05:07,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:05:07,946 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:07,959 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:05:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:05:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:05:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:07,966 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:05:07,967 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:05:07,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:05:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:05:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:05:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:05:07,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:05:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:07,998 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:05:07,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:05:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:07,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:08,000 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:08,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:05:08,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:08,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:05:08,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:08,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644005872] [2021-08-25 19:05:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:08,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:08,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:08,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139273539] [2021-08-25 19:05:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:08,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:08,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:08,048 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) [2021-08-25 19:05:08,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:05:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:08,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:08,243 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-25 19:05:08,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-25 19:05:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:08,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644005872] [2021-08-25 19:05:08,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:08,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139273539] [2021-08-25 19:05:08,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139273539] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:08,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:08,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:05:08,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371276066] [2021-08-25 19:05:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:05:08,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:08,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:05:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:05:08,437 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:08,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:08,550 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-25 19:05:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:05:08,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:05:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:08,554 INFO L225 Difference]: With dead ends: 34 [2021-08-25 19:05:08,554 INFO L226 Difference]: Without dead ends: 32 [2021-08-25 19:05:08,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-25 19:05:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-25 19:05:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:08,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:05:08,564 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:05:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:08,564 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:05:08,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:05:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:08,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:08,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:08,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:08,785 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 [2021-08-25 19:05:08,785 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:05:08,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:08,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62736172] [2021-08-25 19:05:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:08,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:08,804 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:08,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058405080] [2021-08-25 19:05:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:08,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:08,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:08,811 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) [2021-08-25 19:05:08,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 19:05:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:08,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:05:08,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:08,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:08,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62736172] [2021-08-25 19:05:08,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:08,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058405080] [2021-08-25 19:05:08,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058405080] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:08,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:08,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:05:08,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026350517] [2021-08-25 19:05:08,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:05:08,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:05:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:05:08,952 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:09,028 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-08-25 19:05:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:05:09,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-08-25 19:05:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:09,029 INFO L225 Difference]: With dead ends: 49 [2021-08-25 19:05:09,029 INFO L226 Difference]: Without dead ends: 40 [2021-08-25 19:05:09,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-25 19:05:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-08-25 19:05:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:05:09,034 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:05:09,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:09,034 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:05:09,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:09,034 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:05:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:09,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:09,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:09,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:09,262 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 [2021-08-25 19:05:09,263 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:05:09,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:09,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534715301] [2021-08-25 19:05:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:09,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:09,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:09,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102794234] [2021-08-25 19:05:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:09,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:09,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:09,309 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) [2021-08-25 19:05:09,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 19:05:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:05:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:09,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:09,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534715301] [2021-08-25 19:05:09,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:09,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102794234] [2021-08-25 19:05:09,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102794234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:09,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:09,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 19:05:09,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672738172] [2021-08-25 19:05:09,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:05:09,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:05:09,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:05:09,450 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:09,527 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-25 19:05:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:05:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-08-25 19:05:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:09,529 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:05:09,529 INFO L226 Difference]: Without dead ends: 37 [2021-08-25 19:05:09,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-25 19:05:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-08-25 19:05:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-25 19:05:09,540 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-08-25 19:05:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:09,540 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-25 19:05:09,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-25 19:05:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:09,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:09,541 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:09,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:09,766 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 [2021-08-25 19:05:09,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:09,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:05:09,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:09,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013455162] [2021-08-25 19:05:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:09,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:09,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:09,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919365416] [2021-08-25 19:05:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:09,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:09,777 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) [2021-08-25 19:05:09,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 19:05:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 19:05:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:09,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:09,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013455162] [2021-08-25 19:05:09,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:09,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919365416] [2021-08-25 19:05:09,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919365416] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:09,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:09,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-25 19:05:09,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011392494] [2021-08-25 19:05:09,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 19:05:09,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 19:05:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:05:09,991 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:10,094 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-08-25 19:05:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:05:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-25 19:05:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:10,095 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:05:10,095 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:05:10,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:05:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:05:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-25 19:05:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-08-25 19:05:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-25 19:05:10,098 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-08-25 19:05:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:10,098 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-25 19:05:10,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-25 19:05:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:10,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:10,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:10,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:10,309 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 [2021-08-25 19:05:10,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:05:10,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:10,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395538311] [2021-08-25 19:05:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:10,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:10,345 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:10,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984765693] [2021-08-25 19:05:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:10,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:10,348 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) [2021-08-25 19:05:10,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 19:05:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 19:05:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:10,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-25 19:05:10,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:05:10,611 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-25 19:05:10,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-08-25 19:05:10,808 INFO L354 Elim1Store]: treesize reduction 124, result has 16.2 percent of original size [2021-08-25 19:05:10,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 48 [2021-08-25 19:05:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:11,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:11,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395538311] [2021-08-25 19:05:11,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:11,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984765693] [2021-08-25 19:05:11,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984765693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:11,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:11,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:05:11,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982040470] [2021-08-25 19:05:11,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:05:11,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:05:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:05:11,087 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:11,403 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-08-25 19:05:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 19:05:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-25 19:05:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:11,404 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:05:11,405 INFO L226 Difference]: Without dead ends: 41 [2021-08-25 19:05:11,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:05:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-25 19:05:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-08-25 19:05:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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) [2021-08-25 19:05:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-25 19:05:11,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-08-25 19:05:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:11,409 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-25 19:05:11,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-25 19:05:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:05:11,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:11,410 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:11,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:11,620 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 [2021-08-25 19:05:11,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:11,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-08-25 19:05:11,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:11,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591699865] [2021-08-25 19:05:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:11,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:11,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:11,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880191645] [2021-08-25 19:05:11,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:05:11,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:11,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:11,656 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) [2021-08-25 19:05:11,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 19:05:11,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:05:11,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:05:11,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:11,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:11,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591699865] [2021-08-25 19:05:11,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:11,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880191645] [2021-08-25 19:05:11,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880191645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:11,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:11,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:05:11,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472331029] [2021-08-25 19:05:11,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:05:11,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:05:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:11,871 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:12,020 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-08-25 19:05:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:05:12,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-08-25 19:05:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:12,023 INFO L225 Difference]: With dead ends: 65 [2021-08-25 19:05:12,024 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:05:12,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:05:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:05:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-08-25 19:05:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-08-25 19:05:12,040 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-08-25 19:05:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:12,041 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-08-25 19:05:12,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-08-25 19:05:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:05:12,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:12,042 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:12,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:12,248 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 [2021-08-25 19:05:12,249 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2021-08-25 19:05:12,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:12,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449146653] [2021-08-25 19:05:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:12,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:12,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:12,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263398340] [2021-08-25 19:05:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:05:12,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:12,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:12,267 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) [2021-08-25 19:05:12,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 19:05:12,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:05:12,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:05:12,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:12,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:12,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449146653] [2021-08-25 19:05:12,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:12,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263398340] [2021-08-25 19:05:12,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263398340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:12,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:12,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:05:12,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549388570] [2021-08-25 19:05:12,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:05:12,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:05:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:12,523 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:12,634 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-25 19:05:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:12,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-08-25 19:05:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:12,636 INFO L225 Difference]: With dead ends: 60 [2021-08-25 19:05:12,636 INFO L226 Difference]: Without dead ends: 53 [2021-08-25 19:05:12,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:05:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-25 19:05:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-08-25 19:05:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-08-25 19:05:12,640 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2021-08-25 19:05:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:12,641 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-08-25 19:05:12,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-08-25 19:05:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:05:12,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:12,642 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:12,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:12,861 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 [2021-08-25 19:05:12,862 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2021-08-25 19:05:12,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:12,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453105136] [2021-08-25 19:05:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:12,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:12,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:12,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542606637] [2021-08-25 19:05:12,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:05:12,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:12,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:12,881 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) [2021-08-25 19:05:12,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 19:05:13,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:05:13,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:13,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-25 19:05:13,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:13,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-25 19:05:13,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:05:13,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,265 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-25 19:05:13,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-08-25 19:05:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 63 [2021-08-25 19:05:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,424 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:13,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 48 [2021-08-25 19:05:13,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,440 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:13,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 111 treesize of output 52 [2021-08-25 19:05:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,557 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:13,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-08-25 19:05:13,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,806 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-08-25 19:05:13,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 268 treesize of output 510 [2021-08-25 19:05:13,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:13,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:13,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 124 [2021-08-25 19:05:14,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 165 [2021-08-25 19:05:14,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,125 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-08-25 19:05:14,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 243 treesize of output 141 [2021-08-25 19:05:14,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,309 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-25 19:05:14,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 87 treesize of output 72 [2021-08-25 19:05:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:14,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:14,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453105136] [2021-08-25 19:05:14,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:14,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542606637] [2021-08-25 19:05:14,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542606637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:14,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:14,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 19:05:14,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136453744] [2021-08-25 19:05:14,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:05:14,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:05:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:05:14,551 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:15,253 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-08-25 19:05:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-25 19:05:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-08-25 19:05:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:15,256 INFO L225 Difference]: With dead ends: 64 [2021-08-25 19:05:15,256 INFO L226 Difference]: Without dead ends: 62 [2021-08-25 19:05:15,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 578.8ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-25 19:05:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-25 19:05:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2021-08-25 19:05:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-08-25 19:05:15,261 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 20 [2021-08-25 19:05:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:15,262 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-08-25 19:05:15,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-08-25 19:05:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:05:15,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:15,263 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:15,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:15,481 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 [2021-08-25 19:05:15,481 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 5 times [2021-08-25 19:05:15,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:15,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206104751] [2021-08-25 19:05:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:15,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:15,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:15,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117324683] [2021-08-25 19:05:15,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 19:05:15,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:15,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:15,515 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) [2021-08-25 19:05:15,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 19:05:19,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-25 19:05:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:19,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:19,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206104751] [2021-08-25 19:05:19,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:19,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117324683] [2021-08-25 19:05:19,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117324683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:19,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:19,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:05:19,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722558463] [2021-08-25 19:05:19,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:05:19,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:19,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:05:19,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:05:19,656 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:19,800 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-08-25 19:05:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:05:19,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-25 19:05:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:19,803 INFO L225 Difference]: With dead ends: 97 [2021-08-25 19:05:19,803 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 19:05:19,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-25 19:05:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 19:05:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-08-25 19:05:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-08-25 19:05:19,820 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 22 [2021-08-25 19:05:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:19,820 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-08-25 19:05:19,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-08-25 19:05:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:05:19,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:19,822 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:19,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:20,028 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 [2021-08-25 19:05:20,029 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:20,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 6 times [2021-08-25 19:05:20,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:20,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620650158] [2021-08-25 19:05:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:20,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:20,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:20,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65802902] [2021-08-25 19:05:20,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 19:05:20,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:20,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:20,069 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) [2021-08-25 19:05:20,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 19:05:20,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-25 19:05:20,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:20,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:20,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620650158] [2021-08-25 19:05:20,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65802902] [2021-08-25 19:05:20,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65802902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:20,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:20,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:05:20,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55907546] [2021-08-25 19:05:20,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:05:20,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:20,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:05:20,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:05:20,430 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:20,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:20,630 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-08-25 19:05:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 19:05:20,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-25 19:05:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:20,631 INFO L225 Difference]: With dead ends: 81 [2021-08-25 19:05:20,631 INFO L226 Difference]: Without dead ends: 74 [2021-08-25 19:05:20,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:05:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-25 19:05:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-08-25 19:05:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 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) [2021-08-25 19:05:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-08-25 19:05:20,635 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 22 [2021-08-25 19:05:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:20,636 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-08-25 19:05:20,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-08-25 19:05:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:05:20,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:20,641 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:20,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:20,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-25 19:05:20,857 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:20,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:20,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 1 times [2021-08-25 19:05:20,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:20,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007375064] [2021-08-25 19:05:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:20,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:20,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:20,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548931842] [2021-08-25 19:05:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:20,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:20,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:20,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:05:20,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-25 19:05:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:21,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 19:05:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:05:21,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:21,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007375064] [2021-08-25 19:05:21,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:21,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548931842] [2021-08-25 19:05:21,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548931842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:21,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:21,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:05:21,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410184458] [2021-08-25 19:05:21,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:05:21,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:05:21,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:05:21,192 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-08-25 19:05:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:21,305 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-08-25 19:05:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:21,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 24 [2021-08-25 19:05:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:21,307 INFO L225 Difference]: With dead ends: 76 [2021-08-25 19:05:21,307 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:05:21,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:05:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:05:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2021-08-25 19:05:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-25 19:05:21,312 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 24 [2021-08-25 19:05:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:21,313 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-25 19:05:21,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-08-25 19:05:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-25 19:05:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:05:21,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:21,314 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:21,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:21,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-25 19:05:21,529 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 7 times [2021-08-25 19:05:21,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:21,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456308094] [2021-08-25 19:05:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:21,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:21,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:21,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992521340] [2021-08-25 19:05:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 19:05:21,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:21,562 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:05:21,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-25 19:05:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-25 19:05:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:22,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-25 19:05:22,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:05:22,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,176 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-25 19:05:22,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-08-25 19:05:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:22,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 63 [2021-08-25 19:05:22,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:05:22,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:22,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 90 [2021-08-25 19:05:22,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:22,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 56 [2021-08-25 19:05:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,450 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:22,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 46 [2021-08-25 19:05:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,986 INFO L354 Elim1Store]: treesize reduction 1177, result has 19.5 percent of original size [2021-08-25 19:05:22,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 39 case distinctions, treesize of input 216 treesize of output 418 [2021-08-25 19:05:23,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:05:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 73 [2021-08-25 19:05:23,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:05:23,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,619 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-25 19:05:23,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 121 [2021-08-25 19:05:23,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 69 [2021-08-25 19:05:24,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:24,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:05:24,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 91 [2021-08-25 19:05:25,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:25,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456308094] [2021-08-25 19:05:25,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:25,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992521340] [2021-08-25 19:05:25,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-25 19:05:25,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:25,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:05:25,184 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-08-25 19:05:25,184 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:05:25,190 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:05:25,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:25,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-25 19:05:25,408 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:05:25,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:05:25 BoogieIcfgContainer [2021-08-25 19:05:25,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:05:25,419 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:05:25,419 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:05:25,419 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:05:25,420 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:07" (3/4) ... [2021-08-25 19:05:25,422 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:05:25,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:05:25,423 INFO L168 Benchmark]: Toolchain (without parser) took 18420.25 ms. Allocated memory was 56.6 MB in the beginning and 146.8 MB in the end (delta: 90.2 MB). Free memory was 34.9 MB in the beginning and 118.1 MB in the end (delta: -83.3 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:25,423 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 38.1 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:05:25,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.57 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 24.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:25,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.72 ms. Allocated memory is still 56.6 MB. Free memory was 24.6 MB in the beginning and 23.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:05:25,424 INFO L168 Benchmark]: Boogie Preprocessor took 32.84 ms. Allocated memory is still 56.6 MB. Free memory was 23.0 MB in the beginning and 21.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:25,424 INFO L168 Benchmark]: RCFGBuilder took 330.28 ms. Allocated memory is still 56.6 MB. Free memory was 21.6 MB in the beginning and 25.5 MB in the end (delta: -3.9 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:25,424 INFO L168 Benchmark]: TraceAbstraction took 17798.65 ms. Allocated memory was 56.6 MB in the beginning and 146.8 MB in the end (delta: 90.2 MB). Free memory was 25.0 MB in the beginning and 119.2 MB in the end (delta: -94.2 MB). Peak memory consumption was 74.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:25,424 INFO L168 Benchmark]: Witness Printer took 3.09 ms. Allocated memory is still 146.8 MB. Free memory was 119.2 MB in the beginning and 118.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:25,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 38.1 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 206.57 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 24.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.72 ms. Allocated memory is still 56.6 MB. Free memory was 24.6 MB in the beginning and 23.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.84 ms. Allocated memory is still 56.6 MB. Free memory was 23.0 MB in the beginning and 21.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 330.28 ms. Allocated memory is still 56.6 MB. Free memory was 21.6 MB in the beginning and 25.5 MB in the end (delta: -3.9 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17798.65 ms. Allocated memory was 56.6 MB in the beginning and 146.8 MB in the end (delta: 90.2 MB). Free memory was 25.0 MB in the beginning and 119.2 MB in the end (delta: -94.2 MB). Peak memory consumption was 74.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.09 ms. Allocated memory is still 146.8 MB. Free memory was 119.2 MB in the beginning and 118.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i 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 -> 30192b5b0c1eb564e0de6a5c7a5fdad0c55c7aa4 [2021-08-25 19:05:27,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:05:27,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:05:27,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:05:27,784 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:05:27,784 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:05:27,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4.c [2021-08-25 19:05:27,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a65097e40/8757c2ebb70d48c9ab71f635802ea1ac/FLAGb11f2717c [2021-08-25 19:05:28,314 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:05:28,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c [2021-08-25 19:05:28,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a65097e40/8757c2ebb70d48c9ab71f635802ea1ac/FLAGb11f2717c [2021-08-25 19:05:28,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a65097e40/8757c2ebb70d48c9ab71f635802ea1ac [2021-08-25 19:05:28,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:05:28,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:05:28,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:28,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:05:28,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:05:28,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df3361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28, skipping insertion in model container [2021-08-25 19:05:28,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:05:28,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:05:28,466 WARN L228 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-fpi/eqn4.c[587,600] [2021-08-25 19:05:28,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:28,492 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:05:28,508 WARN L228 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-fpi/eqn4.c[587,600] [2021-08-25 19:05:28,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:28,562 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:05:28,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28 WrapperNode [2021-08-25 19:05:28,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:28,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:28,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:05:28,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:05:28,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:28,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:05:28,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:05:28,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:05:28,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:05:28,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:05:28,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:05:28,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:05:28,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (1/1) ... [2021-08-25 19:05:28,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:05:28,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:28,686 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) [2021-08-25 19:05:28,714 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 [2021-08-25 19:05:28,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-25 19:05:28,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:05:28,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-08-25 19:05:28,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:05:28,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:05:28,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:05:28,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-08-25 19:05:29,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:05:29,217 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:05:29,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:29 BoogieIcfgContainer [2021-08-25 19:05:29,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:05:29,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:05:29,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:05:29,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:05:29,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:05:28" (1/3) ... [2021-08-25 19:05:29,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b493f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:29, skipping insertion in model container [2021-08-25 19:05:29,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:28" (2/3) ... [2021-08-25 19:05:29,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b493f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:29, skipping insertion in model container [2021-08-25 19:05:29,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:29" (3/3) ... [2021-08-25 19:05:29,226 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn4.c [2021-08-25 19:05:29,240 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:05:29,240 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:05:29,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:05:29,297 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-25 19:05:29,297 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:05:29,312 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) [2021-08-25 19:05:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:29,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:29,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:29,328 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:05:29,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:29,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598817400] [2021-08-25 19:05:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:29,345 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:29,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:29,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-25 19:05:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:29,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-25 19:05:29,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:29,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:29,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:29,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598817400] [2021-08-25 19:05:29,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598817400] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:29,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:29,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-25 19:05:29,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392557663] [2021-08-25 19:05:29,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:05:29,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:05:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:05:29,709 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:29,721 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:05:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:05:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:05:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:29,728 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:05:29,728 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:05:29,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:05:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:05:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:05:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:05:29,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:05:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:29,762 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:05:29,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:05:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:29,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:29,763 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:29,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:29,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:29,975 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:05:29,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:29,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738444200] [2021-08-25 19:05:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:29,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:29,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:29,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-25 19:05:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:30,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:30,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:30,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:30,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:30,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:30,401 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-08-25 19:05:30,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 68 [2021-08-25 19:05:30,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:30,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:30,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:05:30,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 65 [2021-08-25 19:05:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:30,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:31,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:31,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738444200] [2021-08-25 19:05:31,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738444200] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:31,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:31,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-08-25 19:05:31,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269853490] [2021-08-25 19:05:31,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:05:31,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:31,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:05:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:05:31,613 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:32,657 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-08-25 19:05:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:05:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12 [2021-08-25 19:05:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:32,669 INFO L225 Difference]: With dead ends: 35 [2021-08-25 19:05:32,669 INFO L226 Difference]: Without dead ends: 33 [2021-08-25 19:05:32,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 782.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:05:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-25 19:05:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-08-25 19:05:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:05:32,675 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:05:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:32,675 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:05:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:05:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:32,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:32,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:32,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:32,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:32,877 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:32,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:05:32,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:32,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251754555] [2021-08-25 19:05:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:32,878 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:32,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:32,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-25 19:05:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:33,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:33,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:33,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:33,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251754555] [2021-08-25 19:05:33,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251754555] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:33,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:33,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-08-25 19:05:33,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182081222] [2021-08-25 19:05:33,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:05:33,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:05:33,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:05:33,397 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:33,986 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-25 19:05:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 14 [2021-08-25 19:05:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:33,993 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:05:33,994 INFO L226 Difference]: Without dead ends: 34 [2021-08-25 19:05:33,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:05:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-25 19:05:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-08-25 19:05:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:05:33,998 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:05:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:33,998 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:05:33,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:05:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:33,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:33,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:34,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:34,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:34,201 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:05:34,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:34,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804120473] [2021-08-25 19:05:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:34,203 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:34,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:34,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:34,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-25 19:05:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:34,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 19:05:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:34,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:34,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:34,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804120473] [2021-08-25 19:05:34,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804120473] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:34,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:34,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-25 19:05:34,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40845294] [2021-08-25 19:05:34,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 19:05:34,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:34,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 19:05:34,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:05:34,920 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:35,895 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-25 19:05:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-25 19:05:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:05:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:35,897 INFO L225 Difference]: With dead ends: 58 [2021-08-25 19:05:35,897 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 19:05:35,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 782.4ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-08-25 19:05:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 19:05:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-08-25 19:05:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-25 19:05:35,903 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2021-08-25 19:05:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:35,903 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-25 19:05:35,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-25 19:05:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:35,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:35,904 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:35,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:36,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:36,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:05:36,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:36,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036607662] [2021-08-25 19:05:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:36,111 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:36,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:36,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-25 19:05:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 19:05:36,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:36,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:36,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:36,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036607662] [2021-08-25 19:05:36,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036607662] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:36,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:36,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-25 19:05:36,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081388733] [2021-08-25 19:05:36,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:05:36,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:36,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:05:36,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:05:36,875 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:37,368 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-08-25 19:05:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:37,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:05:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:37,377 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:05:37,377 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:05:37,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-25 19:05:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:05:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-08-25 19:05:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-25 19:05:37,381 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-25 19:05:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:37,381 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-25 19:05:37,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-25 19:05:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:37,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:37,382 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:37,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:37,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:37,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:37,588 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:05:37,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:37,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982260066] [2021-08-25 19:05:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:37,589 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:37,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:37,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:37,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-25 19:05:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 19:05:37,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:37,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-08-25 19:05:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:37,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-25 19:05:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:38,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:38,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:38,334 INFO L354 Elim1Store]: treesize reduction 883, result has 10.4 percent of original size [2021-08-25 19:05:38,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 132 treesize of output 141 [2021-08-25 19:05:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,629 INFO L354 Elim1Store]: treesize reduction 1444, result has 3.5 percent of original size [2021-08-25 19:05:39,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 70 case distinctions, treesize of input 290 treesize of output 247 [2021-08-25 19:05:42,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:42,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:42,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:42,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:42,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:42,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:42,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:42,846 INFO L354 Elim1Store]: treesize reduction 1186, result has 6.2 percent of original size [2021-08-25 19:05:42,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 363 treesize of output 203 [2021-08-25 19:05:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:42,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:58,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:58,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982260066] [2021-08-25 19:05:58,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982260066] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:58,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:58,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-25 19:05:58,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132831004] [2021-08-25 19:05:58,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-25 19:05:58,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:58,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-25 19:05:58,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=115, Unknown=4, NotChecked=0, Total=156 [2021-08-25 19:05:58,382 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:19,600 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse8 ((_ sign_extend 32) (_ bv1 32))) (.cse2 ((_ sign_extend 32) (_ bv0 32)))) (= (let ((.cse0 (let ((.cse3 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base))) (let ((.cse4 (bvmul ((_ extract 31 0) c_ULTIMATE.start_main_~i~0) (_ bv8 32))) (.cse5 (let ((.cse6 (bvmul ((_ extract 31 0) (bvadd (bvneg .cse8) c_ULTIMATE.start_main_~i~0)) (_ bv8 32)))) (bvadd (concat (select .cse3 (bvadd .cse6 (_ bv4 32) c_ULTIMATE.start_main_~b~0.offset)) (select .cse3 (bvadd .cse6 c_ULTIMATE.start_main_~b~0.offset))) (let ((.cse7 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (concat (select .cse7 (bvadd .cse6 (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (select .cse7 (bvadd .cse6 c_ULTIMATE.start_main_~a~0.offset)))))))) (store (store .cse3 (bvadd .cse4 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 31 0) .cse5)) (bvadd (_ bv4 32) .cse4 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 63 32) .cse5))))) (.cse1 (bvmul ((_ extract 31 0) .cse2) (_ bv8 32)))) (concat (select .cse0 (bvadd (_ bv4 32) .cse1 c_ULTIMATE.start_main_~b~0.offset)) (select .cse0 (bvadd .cse1 c_ULTIMATE.start_main_~b~0.offset)))) (let ((.cse9 ((_ sign_extend 32) (_ bv4 32)))) (bvadd .cse8 (bvmul .cse9 .cse2 .cse2) (bvmul .cse9 .cse2))))) (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 64))) (let ((.cse12 ((_ sign_extend 32) (_ bv0 32))) (.cse10 ((_ sign_extend 32) (_ bv1 32)))) (= (let ((.cse11 ((_ sign_extend 32) (_ bv4 32)))) (bvadd .cse10 (bvmul .cse11 .cse12 .cse12) (bvmul .cse11 .cse12))) (let ((.cse13 (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse15 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (let ((.cse16 (bvmul ((_ extract 31 0) ULTIMATE.start_main_~i~0) (_ bv8 32))) (.cse17 (bvadd ((_ sign_extend 32) (_ bv8 32)) (let ((.cse18 (bvmul ((_ extract 31 0) (bvadd (bvneg .cse10) ULTIMATE.start_main_~i~0)) (_ bv8 32)))) (concat (select .cse15 (bvadd .cse18 (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (select .cse15 (bvadd .cse18 c_ULTIMATE.start_main_~a~0.offset))))))) (store (store .cse15 (bvadd .cse16 c_ULTIMATE.start_main_~a~0.offset) ((_ extract 31 0) .cse17)) (bvadd (_ bv4 32) .cse16 c_ULTIMATE.start_main_~a~0.offset) ((_ extract 63 32) .cse17))))) c_ULTIMATE.start_main_~b~0.base)) (.cse14 (bvmul ((_ extract 31 0) .cse12) (_ bv8 32)))) (concat (select .cse13 (bvadd (_ bv4 32) .cse14 c_ULTIMATE.start_main_~b~0.offset)) (select .cse13 (bvadd .cse14 c_ULTIMATE.start_main_~b~0.offset)))))))) is different from false [2021-08-25 19:06:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:38,417 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-08-25 19:06:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-25 19:06:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:06:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:38,418 INFO L225 Difference]: With dead ends: 73 [2021-08-25 19:06:38,418 INFO L226 Difference]: Without dead ends: 71 [2021-08-25 19:06:38,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 39444.4ms TimeCoverageRelationStatistics Valid=188, Invalid=559, Unknown=13, NotChecked=52, Total=812 [2021-08-25 19:06:38,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-25 19:06:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 36. [2021-08-25 19:06:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-25 19:06:38,429 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2021-08-25 19:06:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:38,429 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-25 19:06:38,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-25 19:06:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:06:38,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:38,430 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:38,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-25 19:06:38,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:06:38,633 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:38,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:38,634 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-08-25 19:06:38,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:06:38,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248248835] [2021-08-25 19:06:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:38,635 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:06:38,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:06:38,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:06:38,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-25 19:06:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:06:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-25 19:06:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:06:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-08-25 19:06:39,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-25 19:06:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,371 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-25 19:06:39,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 127 [2021-08-25 19:06:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:39,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:39,842 INFO L354 Elim1Store]: treesize reduction 132, result has 15.9 percent of original size [2021-08-25 19:06:39,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 278 treesize of output 201 [2021-08-25 19:06:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:40,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:40,815 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-08-25 19:06:40,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 371 treesize of output 141 [2021-08-25 19:06:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:06:40,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:06:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:06:44,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:06:44,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248248835] [2021-08-25 19:06:44,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248248835] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:06:44,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:06:44,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-25 19:06:44,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539374962] [2021-08-25 19:06:44,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-25 19:06:44,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:06:44,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-25 19:06:44,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:06:44,784 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:07:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:07:10,496 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-08-25 19:07:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-25 19:07:10,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:07:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:07:10,498 INFO L225 Difference]: With dead ends: 79 [2021-08-25 19:07:10,498 INFO L226 Difference]: Without dead ends: 77 [2021-08-25 19:07:10,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 14465.2ms TimeCoverageRelationStatistics Valid=219, Invalid=710, Unknown=1, NotChecked=0, Total=930 [2021-08-25 19:07:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-25 19:07:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2021-08-25 19:07:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:07:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-08-25 19:07:10,510 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 20 [2021-08-25 19:07:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:07:10,510 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-08-25 19:07:10,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:07:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-08-25 19:07:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:07:10,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:07:10,511 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:07:10,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-08-25 19:07:10,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:07:10,725 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:07:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:07:10,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 2 times [2021-08-25 19:07:10,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:07:10,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120081692] [2021-08-25 19:07:10,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:07:10,730 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:07:10,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:07:10,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:07:10,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-25 19:07:11,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:07:11,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:07:11,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 19:07:11,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:07:11,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-08-25 19:07:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:11,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:07:11,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-25 19:07:11,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:11,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:11,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:07:11,661 INFO L354 Elim1Store]: treesize reduction 883, result has 10.4 percent of original size [2021-08-25 19:07:11,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 132 treesize of output 141 [2021-08-25 19:07:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:08:01,895 WARN L207 SmtUtils]: Spent 49.74 s on a formula simplification. DAG size of input: 247 DAG size of output: 101 [2021-08-25 19:08:01,897 INFO L354 Elim1Store]: treesize reduction 1367, result has 19.4 percent of original size [2021-08-25 19:08:01,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 237 treesize of output 415 [2021-08-25 19:10:28,442 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-25 19:10:28,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:10:28,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120081692] [2021-08-25 19:10:28,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-08-25 19:10:28,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2067793587] [2021-08-25 19:10:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:10:28,445 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-25 19:10:28,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-25 19:10:28,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-08-25 19:10:28,470 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-25 19:10:28,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-08-25 19:10:29,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:10:29,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692346313] [2021-08-25 19:10:29,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:10:29,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:10:29,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:10:29,071 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) [2021-08-25 19:10:29,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 1 [2021-08-25 19:10:29,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 19:10:29,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:10:29,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:10:29,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-25 19:10:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:10:29,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-08-25 19:10:29,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:10:29,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:10:29,490 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-25 19:10:29,490 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:10:29,493 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:10:29,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 19:10:29,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-08-25 19:10:29,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:10:29,900 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:10:29,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:10:29 BoogieIcfgContainer [2021-08-25 19:10:29,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:10:29,910 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:10:29,911 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:10:29,911 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:10:29,911 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:29" (3/4) ... [2021-08-25 19:10:29,921 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:10:29,921 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:10:29,922 INFO L168 Benchmark]: Toolchain (without parser) took 301585.19 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 32.7 MB in the beginning and 37.0 MB in the end (delta: -4.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:29,922 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 36.1 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:10:29,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.28 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 36.8 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:29,923 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.04 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 35.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:10:29,923 INFO L168 Benchmark]: Boogie Preprocessor took 38.27 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 33.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:29,925 INFO L168 Benchmark]: RCFGBuilder took 565.00 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 33.6 MB in the beginning and 42.6 MB in the end (delta: -9.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:29,925 INFO L168 Benchmark]: TraceAbstraction took 300689.74 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 42.1 MB in the beginning and 37.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:29,925 INFO L168 Benchmark]: Witness Printer took 11.02 ms. Allocated memory is still 81.8 MB. Free memory was 37.3 MB in the beginning and 37.0 MB in the end (delta: 265.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:10:29,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 36.1 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 225.28 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 36.8 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.04 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 35.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.27 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 33.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 565.00 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 33.6 MB in the beginning and 42.6 MB in the end (delta: -9.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 300689.74 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 42.1 MB in the beginning and 37.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Witness Printer took 11.02 ms. Allocated memory is still 81.8 MB. Free memory was 37.3 MB in the beginning and 37.0 MB in the end (delta: 265.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i