./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c503be2a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 5fcd543cb1957623bf3d9cdb364b0a789b957ced ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 17:57:01,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 17:57:01,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 17:57:01,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 17:57:01,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 17:57:01,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 17:57:01,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 17:57:01,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 17:57:01,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 17:57:01,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 17:57:01,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 17:57:01,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 17:57:01,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 17:57:01,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 17:57:01,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 17:57:01,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 17:57:01,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 17:57:01,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 17:57:01,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 17:57:01,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 17:57:01,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 17:57:01,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 17:57:01,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 17:57:01,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 17:57:01,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 17:57:01,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 17:57:01,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 17:57:01,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 17:57:01,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 17:57:01,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 17:57:01,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 17:57:01,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 17:57:01,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 17:57:01,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 17:57:01,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 17:57:01,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 17:57:01,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 17:57:01,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 17:57:01,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 17:57:01,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 17:57:01,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 17:57:01,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 17:57:01,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 17:57:01,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 17:57:01,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 17:57:01,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 17:57:01,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 17:57:01,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 17:57:01,296 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 17:57:01,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 17:57:01,296 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 17:57:01,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 17:57:01,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 17:57:01,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 17:57:01,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 17:57:01,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 17:57:01,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 17:57:01,299 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 17:57:01,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 17:57:01,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 17:57:01,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 17:57:01,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 17:57:01,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 17:57:01,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 17:57:01,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 17:57:01,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 17:57:01,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 17:57:01,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 17:57:01,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 17:57:01,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 17:57:01,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 17:57:01,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 17:57:01,302 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fcd543cb1957623bf3d9cdb364b0a789b957ced [2021-10-13 17:57:01,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 17:57:01,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 17:57:01,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 17:57:01,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 17:57:01,778 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 17:57:01,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-10-13 17:57:01,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/211fd0d22/e9050b7bde454fd8989e86ad7a0058ca/FLAG044f58c1c [2021-10-13 17:57:02,528 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 17:57:02,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-10-13 17:57:02,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/211fd0d22/e9050b7bde454fd8989e86ad7a0058ca/FLAG044f58c1c [2021-10-13 17:57:02,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/211fd0d22/e9050b7bde454fd8989e86ad7a0058ca [2021-10-13 17:57:02,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 17:57:02,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 17:57:02,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 17:57:02,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 17:57:02,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 17:57:02,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:57:02" (1/1) ... [2021-10-13 17:57:02,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@583b2572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:02, skipping insertion in model container [2021-10-13 17:57:02,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:57:02" (1/1) ... [2021-10-13 17:57:02,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 17:57:02,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 17:57:03,115 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2021-10-13 17:57:03,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 17:57:03,137 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 17:57:03,172 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2021-10-13 17:57:03,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 17:57:03,196 INFO L208 MainTranslator]: Completed translation [2021-10-13 17:57:03,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03 WrapperNode [2021-10-13 17:57:03,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 17:57:03,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 17:57:03,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 17:57:03,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 17:57:03,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 17:57:03,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 17:57:03,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 17:57:03,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 17:57:03,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 17:57:03,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 17:57:03,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 17:57:03,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 17:57:03,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (1/1) ... [2021-10-13 17:57:03,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 17:57:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:03,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 17:57:03,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 17:57:03,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 17:57:03,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 17:57:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 17:57:03,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 17:57:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 17:57:03,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 17:57:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 17:57:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 17:57:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 17:57:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 17:57:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 17:57:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 17:57:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 17:57:03,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 17:57:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 17:57:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 17:57:03,442 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 17:57:04,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 17:57:04,769 INFO L299 CfgBuilder]: Removed 46 assume(true) statements. [2021-10-13 17:57:04,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:57:04 BoogieIcfgContainer [2021-10-13 17:57:04,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 17:57:04,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 17:57:04,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 17:57:04,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 17:57:04,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:57:02" (1/3) ... [2021-10-13 17:57:04,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ec258d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:57:04, skipping insertion in model container [2021-10-13 17:57:04,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:03" (2/3) ... [2021-10-13 17:57:04,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ec258d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:57:04, skipping insertion in model container [2021-10-13 17:57:04,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:57:04" (3/3) ... [2021-10-13 17:57:04,784 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2021-10-13 17:57:04,793 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-13 17:57:04,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 17:57:04,794 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 17:57:04,794 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 17:57:04,859 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,860 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,860 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,860 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,860 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,861 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,861 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,861 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,862 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,864 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,864 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,865 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,865 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,865 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,865 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,866 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,867 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,867 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,867 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,867 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,868 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,869 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,869 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,870 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,870 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,870 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,870 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,872 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,872 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,872 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,873 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,874 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,874 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,874 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,874 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,875 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,875 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,875 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,875 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,876 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,876 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,876 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,877 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,877 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,877 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,877 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,878 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,879 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,879 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,879 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,879 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,880 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,880 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,881 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,882 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,882 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,882 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,883 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,884 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,885 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,885 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,885 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,886 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,886 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,887 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,887 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,888 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,888 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,888 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,889 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,890 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,890 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,890 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,891 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,891 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,891 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,891 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,891 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,893 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,893 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,894 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,895 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,898 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,898 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,898 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,900 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,900 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,901 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,901 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,902 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,902 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,909 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,909 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,909 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,910 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,911 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,911 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,911 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,911 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,912 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,912 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,912 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,912 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,913 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,913 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,913 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,913 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,913 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,914 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,914 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,914 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,914 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,915 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,915 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,915 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,915 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,916 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,916 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,916 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,916 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,917 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,917 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,917 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,917 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,918 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,918 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,918 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,919 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,919 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,919 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,919 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,920 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,920 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,920 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,920 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,921 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,921 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,930 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,931 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,931 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,932 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,932 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,932 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,932 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,933 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,933 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,933 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,933 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,935 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,936 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,936 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,943 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,943 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,944 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,944 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,946 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,946 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,946 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,946 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,948 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,949 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,949 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,949 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,949 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,949 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,950 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,950 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,950 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,950 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,951 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,951 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,951 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,951 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,951 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:57:04,964 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-13 17:57:05,051 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 17:57:05,068 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 [2021-10-13 17:57:05,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-13 17:57:05,096 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 17:57:05,109 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 241 transitions, 506 flow [2021-10-13 17:57:05,113 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 241 transitions, 506 flow [2021-10-13 17:57:05,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 229 places, 241 transitions, 506 flow [2021-10-13 17:57:05,237 INFO L129 PetriNetUnfolder]: 22/238 cut-off events. [2021-10-13 17:57:05,238 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-13 17:57:05,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 238 events. 22/238 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 159 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 201. Up to 3 conditions per place. [2021-10-13 17:57:05,253 INFO L116 LiptonReduction]: Number of co-enabled transitions 1962 [2021-10-13 17:57:17,130 INFO L131 LiptonReduction]: Checked pairs total: 3077 [2021-10-13 17:57:17,130 INFO L133 LiptonReduction]: Total number of compositions: 251 [2021-10-13 17:57:17,141 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 35 transitions, 94 flow [2021-10-13 17:57:17,168 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 173 states, 172 states have (on average 3.372093023255814) internal successors, (580), 172 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 172 states have (on average 3.372093023255814) internal successors, (580), 172 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 17:57:17,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:17,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:17,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:17,192 INFO L82 PathProgramCache]: Analyzing trace with hash 804380775, now seen corresponding path program 1 times [2021-10-13 17:57:17,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:17,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90895360] [2021-10-13 17:57:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:17,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:57:17,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:17,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90895360] [2021-10-13 17:57:17,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90895360] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:57:17,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:57:17,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 17:57:17,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223492613] [2021-10-13 17:57:17,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 17:57:17,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 17:57:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:57:17,612 INFO L87 Difference]: Start difference. First operand has 173 states, 172 states have (on average 3.372093023255814) internal successors, (580), 172 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-10-13 17:57:17,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:17,661 INFO L93 Difference]: Finished difference Result 219 states and 690 transitions. [2021-10-13 17:57:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 17:57:17,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 [2021-10-13 17:57:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:17,679 INFO L225 Difference]: With dead ends: 219 [2021-10-13 17:57:17,679 INFO L226 Difference]: Without dead ends: 219 [2021-10-13 17:57:17,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:57:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-10-13 17:57:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-10-13 17:57:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.165137614678899) internal successors, (690), 218 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 690 transitions. [2021-10-13 17:57:17,748 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 690 transitions. Word has length 22 [2021-10-13 17:57:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:17,749 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 690 transitions. [2021-10-13 17:57:17,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-10-13 17:57:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 690 transitions. [2021-10-13 17:57:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 17:57:17,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:17,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:17,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 17:57:17,755 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash 927244901, now seen corresponding path program 1 times [2021-10-13 17:57:17,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:17,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674354532] [2021-10-13 17:57:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:17,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:57:17,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:17,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674354532] [2021-10-13 17:57:17,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674354532] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:57:17,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:57:17,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 17:57:17,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006374410] [2021-10-13 17:57:17,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 17:57:17,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:17,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 17:57:17,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 17:57:17,923 INFO L87 Difference]: Start difference. First operand 219 states and 690 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:17,981 INFO L93 Difference]: Finished difference Result 251 states and 751 transitions. [2021-10-13 17:57:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 17:57:17,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 17:57:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:17,988 INFO L225 Difference]: With dead ends: 251 [2021-10-13 17:57:17,990 INFO L226 Difference]: Without dead ends: 220 [2021-10-13 17:57:17,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 17:57:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-13 17:57:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-10-13 17:57:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.1552511415525113) internal successors, (691), 219 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 691 transitions. [2021-10-13 17:57:18,034 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 691 transitions. Word has length 23 [2021-10-13 17:57:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:18,035 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 691 transitions. [2021-10-13 17:57:18,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 691 transitions. [2021-10-13 17:57:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 17:57:18,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:18,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:18,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 17:57:18,043 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:18,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:18,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2022775507, now seen corresponding path program 1 times [2021-10-13 17:57:18,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:18,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923729427] [2021-10-13 17:57:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:18,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:57:18,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:18,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923729427] [2021-10-13 17:57:18,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923729427] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:57:18,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:57:18,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 17:57:18,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879893322] [2021-10-13 17:57:18,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 17:57:18,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:18,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 17:57:18,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 17:57:18,165 INFO L87 Difference]: Start difference. First operand 220 states and 691 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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) [2021-10-13 17:57:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:18,233 INFO L93 Difference]: Finished difference Result 409 states and 1167 transitions. [2021-10-13 17:57:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 17:57:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 [2021-10-13 17:57:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:18,241 INFO L225 Difference]: With dead ends: 409 [2021-10-13 17:57:18,241 INFO L226 Difference]: Without dead ends: 221 [2021-10-13 17:57:18,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 17:57:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-10-13 17:57:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-10-13 17:57:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.1454545454545455) internal successors, (692), 220 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 692 transitions. [2021-10-13 17:57:18,271 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 692 transitions. Word has length 24 [2021-10-13 17:57:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:18,276 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 692 transitions. [2021-10-13 17:57:18,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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) [2021-10-13 17:57:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 692 transitions. [2021-10-13 17:57:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 17:57:18,282 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:18,283 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:18,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 17:57:18,283 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:18,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1663175417, now seen corresponding path program 1 times [2021-10-13 17:57:18,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:18,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412865221] [2021-10-13 17:57:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:18,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 17:57:18,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:18,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412865221] [2021-10-13 17:57:18,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412865221] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:57:18,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:57:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 17:57:18,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340163757] [2021-10-13 17:57:18,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 17:57:18,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:18,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 17:57:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 17:57:18,449 INFO L87 Difference]: Start difference. First operand 221 states and 692 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:18,506 INFO L93 Difference]: Finished difference Result 403 states and 1199 transitions. [2021-10-13 17:57:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 17:57:18,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 17:57:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:18,510 INFO L225 Difference]: With dead ends: 403 [2021-10-13 17:57:18,510 INFO L226 Difference]: Without dead ends: 222 [2021-10-13 17:57:18,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 17:57:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-13 17:57:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-10-13 17:57:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.1357466063348416) internal successors, (693), 221 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 693 transitions. [2021-10-13 17:57:18,523 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 693 transitions. Word has length 25 [2021-10-13 17:57:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:18,523 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 693 transitions. [2021-10-13 17:57:18,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 693 transitions. [2021-10-13 17:57:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 17:57:18,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:18,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:18,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 17:57:18,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:18,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1112932708, now seen corresponding path program 1 times [2021-10-13 17:57:18,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:18,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657179389] [2021-10-13 17:57:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:18,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 17:57:18,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:18,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657179389] [2021-10-13 17:57:18,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657179389] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:57:18,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:57:18,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 17:57:18,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034756416] [2021-10-13 17:57:18,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 17:57:18,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 17:57:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:57:18,787 INFO L87 Difference]: Start difference. First operand 222 states and 693 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 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) [2021-10-13 17:57:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:18,804 INFO L93 Difference]: Finished difference Result 391 states and 1229 transitions. [2021-10-13 17:57:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 17:57:18,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 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) Word has length 26 [2021-10-13 17:57:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:18,809 INFO L225 Difference]: With dead ends: 391 [2021-10-13 17:57:18,809 INFO L226 Difference]: Without dead ends: 310 [2021-10-13 17:57:18,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:57:18,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-13 17:57:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 266. [2021-10-13 17:57:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.1622641509433964) internal successors, (838), 265 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 838 transitions. [2021-10-13 17:57:18,826 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 838 transitions. Word has length 26 [2021-10-13 17:57:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:18,827 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 838 transitions. [2021-10-13 17:57:18,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 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) [2021-10-13 17:57:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 838 transitions. [2021-10-13 17:57:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 17:57:18,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:18,829 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:18,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 17:57:18,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:18,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1266000204, now seen corresponding path program 1 times [2021-10-13 17:57:18,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:18,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001794407] [2021-10-13 17:57:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:18,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 17:57:18,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:18,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001794407] [2021-10-13 17:57:18,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001794407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:18,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245282953] [2021-10-13 17:57:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:18,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:18,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:18,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:57:18,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 17:57:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 17:57:19,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:57:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 17:57:19,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245282953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:19,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:57:19,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-13 17:57:19,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958321165] [2021-10-13 17:57:19,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 17:57:19,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 17:57:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 17:57:19,317 INFO L87 Difference]: Start difference. First operand 266 states and 838 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-10-13 17:57:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:19,364 INFO L93 Difference]: Finished difference Result 448 states and 1353 transitions. [2021-10-13 17:57:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 17:57:19,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) Word has length 28 [2021-10-13 17:57:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:19,368 INFO L225 Difference]: With dead ends: 448 [2021-10-13 17:57:19,368 INFO L226 Difference]: Without dead ends: 267 [2021-10-13 17:57:19,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 17:57:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-13 17:57:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2021-10-13 17:57:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.154135338345865) internal successors, (839), 266 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 839 transitions. [2021-10-13 17:57:19,383 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 839 transitions. Word has length 28 [2021-10-13 17:57:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:19,383 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 839 transitions. [2021-10-13 17:57:19,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-10-13 17:57:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 839 transitions. [2021-10-13 17:57:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 17:57:19,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:19,386 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:19,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 17:57:19,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:19,601 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2058214276, now seen corresponding path program 2 times [2021-10-13 17:57:19,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:19,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704506620] [2021-10-13 17:57:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:19,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 17:57:19,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:19,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704506620] [2021-10-13 17:57:19,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704506620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:57:19,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:57:19,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 17:57:19,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488507426] [2021-10-13 17:57:19,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 17:57:19,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 17:57:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:57:19,714 INFO L87 Difference]: Start difference. First operand 267 states and 839 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-10-13 17:57:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:19,728 INFO L93 Difference]: Finished difference Result 201 states and 620 transitions. [2021-10-13 17:57:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 17:57:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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 29 [2021-10-13 17:57:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:19,733 INFO L225 Difference]: With dead ends: 201 [2021-10-13 17:57:19,733 INFO L226 Difference]: Without dead ends: 201 [2021-10-13 17:57:19,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:57:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-13 17:57:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-10-13 17:57:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 3.1) internal successors, (620), 200 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 620 transitions. [2021-10-13 17:57:19,742 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 620 transitions. Word has length 29 [2021-10-13 17:57:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:19,743 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 620 transitions. [2021-10-13 17:57:19,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2021-10-13 17:57:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 620 transitions. [2021-10-13 17:57:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 17:57:19,745 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:19,745 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:19,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 17:57:19,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash -95510076, now seen corresponding path program 3 times [2021-10-13 17:57:19,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:19,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205054735] [2021-10-13 17:57:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:19,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 17:57:20,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:20,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205054735] [2021-10-13 17:57:20,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205054735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:20,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378682525] [2021-10-13 17:57:20,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 17:57:20,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:20,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:20,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:57:20,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 17:57:20,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 17:57:20,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:57:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 17:57:20,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:57:20,997 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:57:20,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-13 17:57:21,117 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:57:21,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-13 17:57:21,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-10-13 17:57:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 17:57:21,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378682525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:21,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:57:21,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-13 17:57:21,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115911029] [2021-10-13 17:57:21,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 17:57:21,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 17:57:21,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-10-13 17:57:21,284 INFO L87 Difference]: Start difference. First operand 201 states and 620 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) [2021-10-13 17:57:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:22,700 INFO L93 Difference]: Finished difference Result 617 states and 1887 transitions. [2021-10-13 17:57:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 17:57:22,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) Word has length 29 [2021-10-13 17:57:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:22,705 INFO L225 Difference]: With dead ends: 617 [2021-10-13 17:57:22,705 INFO L226 Difference]: Without dead ends: 537 [2021-10-13 17:57:22,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1096.5ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 17:57:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-10-13 17:57:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 431. [2021-10-13 17:57:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.1325581395348836) internal successors, (1347), 430 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1347 transitions. [2021-10-13 17:57:22,728 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1347 transitions. Word has length 29 [2021-10-13 17:57:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:22,729 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1347 transitions. [2021-10-13 17:57:22,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) [2021-10-13 17:57:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1347 transitions. [2021-10-13 17:57:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 17:57:22,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:22,732 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:22,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 17:57:22,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-13 17:57:22,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1306677620, now seen corresponding path program 4 times [2021-10-13 17:57:22,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:22,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899301537] [2021-10-13 17:57:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:22,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 17:57:23,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:23,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899301537] [2021-10-13 17:57:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899301537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:23,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616115601] [2021-10-13 17:57:23,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 17:57:23,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:23,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:57:23,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 17:57:23,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 17:57:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:57:23,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 17:57:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:57:23,731 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 87 treesize of output 83 [2021-10-13 17:57:23,955 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:57:23,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 17:57:24,000 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:57:24,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 17:57:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-10-13 17:57:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 17:57:24,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616115601] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:24,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:57:24,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-13 17:57:24,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335442881] [2021-10-13 17:57:24,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 17:57:24,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 17:57:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-10-13 17:57:24,073 INFO L87 Difference]: Start difference. First operand 431 states and 1347 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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) [2021-10-13 17:57:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:24,567 INFO L93 Difference]: Finished difference Result 537 states and 1568 transitions. [2021-10-13 17:57:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 17:57:24,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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) Word has length 30 [2021-10-13 17:57:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:24,573 INFO L225 Difference]: With dead ends: 537 [2021-10-13 17:57:24,574 INFO L226 Difference]: Without dead ends: 537 [2021-10-13 17:57:24,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-10-13 17:57:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-10-13 17:57:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 359. [2021-10-13 17:57:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.974860335195531) internal successors, (1065), 358 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1065 transitions. [2021-10-13 17:57:24,592 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1065 transitions. Word has length 30 [2021-10-13 17:57:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:24,592 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1065 transitions. [2021-10-13 17:57:24,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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) [2021-10-13 17:57:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1065 transitions. [2021-10-13 17:57:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 17:57:24,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:24,595 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:24,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 17:57:24,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:24,809 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:24,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1012717408, now seen corresponding path program 1 times [2021-10-13 17:57:24,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:24,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580655753] [2021-10-13 17:57:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:24,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 17:57:24,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:24,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580655753] [2021-10-13 17:57:24,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580655753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:24,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178002493] [2021-10-13 17:57:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:24,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:24,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:24,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:57:24,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 17:57:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 17:57:25,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:57:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 17:57:25,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178002493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:25,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:57:25,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-13 17:57:25,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010070978] [2021-10-13 17:57:25,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 17:57:25,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 17:57:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-13 17:57:25,259 INFO L87 Difference]: Start difference. First operand 359 states and 1065 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-10-13 17:57:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:25,343 INFO L93 Difference]: Finished difference Result 559 states and 1543 transitions. [2021-10-13 17:57:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 17:57:25,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-13 17:57:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:25,347 INFO L225 Difference]: With dead ends: 559 [2021-10-13 17:57:25,348 INFO L226 Difference]: Without dead ends: 361 [2021-10-13 17:57:25,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-13 17:57:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-10-13 17:57:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2021-10-13 17:57:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.963888888888889) internal successors, (1067), 360 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1067 transitions. [2021-10-13 17:57:25,362 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1067 transitions. Word has length 31 [2021-10-13 17:57:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:25,363 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1067 transitions. [2021-10-13 17:57:25,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-10-13 17:57:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1067 transitions. [2021-10-13 17:57:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 17:57:25,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:25,365 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:25,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 17:57:25,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 17:57:25,580 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 293985162, now seen corresponding path program 2 times [2021-10-13 17:57:25,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:25,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941680067] [2021-10-13 17:57:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:25,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 17:57:25,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:25,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941680067] [2021-10-13 17:57:25,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941680067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:25,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028634215] [2021-10-13 17:57:25,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 17:57:25,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:25,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:25,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:57:25,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 17:57:25,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 17:57:25,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:57:25,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 17:57:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:57:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 17:57:26,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028634215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:26,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:57:26,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 13 [2021-10-13 17:57:26,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538056661] [2021-10-13 17:57:26,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 17:57:26,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 17:57:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-13 17:57:26,175 INFO L87 Difference]: Start difference. First operand 361 states and 1067 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:26,342 INFO L93 Difference]: Finished difference Result 333 states and 865 transitions. [2021-10-13 17:57:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 17:57:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 17:57:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:26,345 INFO L225 Difference]: With dead ends: 333 [2021-10-13 17:57:26,346 INFO L226 Difference]: Without dead ends: 317 [2021-10-13 17:57:26,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-13 17:57:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-10-13 17:57:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 243. [2021-10-13 17:57:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.7148760330578514) internal successors, (657), 242 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 657 transitions. [2021-10-13 17:57:26,357 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 657 transitions. Word has length 32 [2021-10-13 17:57:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:26,358 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 657 transitions. [2021-10-13 17:57:26,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 657 transitions. [2021-10-13 17:57:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 17:57:26,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:26,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:26,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 17:57:26,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:26,576 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1969722294, now seen corresponding path program 3 times [2021-10-13 17:57:26,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:26,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606006135] [2021-10-13 17:57:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:26,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:57:27,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:27,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606006135] [2021-10-13 17:57:27,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606006135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:27,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843651557] [2021-10-13 17:57:27,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 17:57:27,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:27,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:27,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:57:27,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 17:57:27,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 17:57:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:57:27,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-13 17:57:27,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:57:28,508 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 17:57:28,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-10-13 17:57:28,662 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 17:57:28,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-10-13 17:57:29,141 INFO L354 Elim1Store]: treesize reduction 13, result has 77.2 percent of original size [2021-10-13 17:57:29,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 72 [2021-10-13 17:57:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:57:29,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843651557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:29,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:57:29,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-10-13 17:57:29,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710814261] [2021-10-13 17:57:29,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 17:57:29,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 17:57:29,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 17:57:29,503 INFO L87 Difference]: Start difference. First operand 243 states and 657 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:34,126 INFO L93 Difference]: Finished difference Result 446 states and 1083 transitions. [2021-10-13 17:57:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 17:57:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 17:57:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:34,131 INFO L225 Difference]: With dead ends: 446 [2021-10-13 17:57:34,131 INFO L226 Difference]: Without dead ends: 422 [2021-10-13 17:57:34,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 4620.3ms TimeCoverageRelationStatistics Valid=383, Invalid=2809, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 17:57:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-10-13 17:57:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 300. [2021-10-13 17:57:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.5953177257525084) internal successors, (776), 299 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 776 transitions. [2021-10-13 17:57:34,144 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 776 transitions. Word has length 32 [2021-10-13 17:57:34,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:34,145 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 776 transitions. [2021-10-13 17:57:34,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 776 transitions. [2021-10-13 17:57:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 17:57:34,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:34,147 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:34,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-13 17:57:34,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 17:57:34,361 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1650816472, now seen corresponding path program 4 times [2021-10-13 17:57:34,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:34,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120752577] [2021-10-13 17:57:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:34,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:57:35,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:35,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120752577] [2021-10-13 17:57:35,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120752577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:35,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913893287] [2021-10-13 17:57:35,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 17:57:35,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:35,486 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:57:35,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 17:57:35,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 17:57:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:57:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-13 17:57:35,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:57:35,767 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 158 treesize of output 150 [2021-10-13 17:57:36,705 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 17:57:36,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-13 17:57:37,247 INFO L354 Elim1Store]: treesize reduction 159, result has 17.2 percent of original size [2021-10-13 17:57:37,248 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 61 treesize of output 66 [2021-10-13 17:57:37,628 INFO L354 Elim1Store]: treesize reduction 7, result has 93.1 percent of original size [2021-10-13 17:57:37,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 123 [2021-10-13 17:57:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:57:38,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913893287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:38,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:57:38,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-10-13 17:57:38,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669354068] [2021-10-13 17:57:38,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 17:57:38,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 17:57:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 17:57:38,474 INFO L87 Difference]: Start difference. First operand 300 states and 776 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:57:49,797 INFO L93 Difference]: Finished difference Result 503 states and 1199 transitions. [2021-10-13 17:57:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 17:57:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 17:57:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:57:49,801 INFO L225 Difference]: With dead ends: 503 [2021-10-13 17:57:49,801 INFO L226 Difference]: Without dead ends: 479 [2021-10-13 17:57:49,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 7388.4ms TimeCoverageRelationStatistics Valid=358, Invalid=3062, Unknown=2, NotChecked=0, Total=3422 [2021-10-13 17:57:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-10-13 17:57:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 301. [2021-10-13 17:57:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.59) internal successors, (777), 300 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 777 transitions. [2021-10-13 17:57:49,817 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 777 transitions. Word has length 32 [2021-10-13 17:57:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:57:49,817 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 777 transitions. [2021-10-13 17:57:49,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:57:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 777 transitions. [2021-10-13 17:57:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 17:57:49,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:57:49,819 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:57:49,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 17:57:50,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 17:57:50,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:57:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:57:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1841771902, now seen corresponding path program 5 times [2021-10-13 17:57:50,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:57:50,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168949728] [2021-10-13 17:57:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:57:50,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:57:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:57:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:57:51,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:57:51,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168949728] [2021-10-13 17:57:51,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168949728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:57:51,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554458266] [2021-10-13 17:57:51,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 17:57:51,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:57:51,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:57:51,329 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:57:51,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 17:57:51,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 17:57:51,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:57:51,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 17:57:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:57:51,766 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 55 treesize of output 53 [2021-10-13 17:57:52,072 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:57:52,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 17:57:52,177 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:57:52,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 17:57:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 17:57:52,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554458266] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:57:52,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 17:57:52,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 25 [2021-10-13 17:57:52,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393346255] [2021-10-13 17:57:52,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 17:57:52,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:57:52,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 17:57:52,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-10-13 17:57:52,718 INFO L87 Difference]: Start difference. First operand 301 states and 777 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:58:01,291 INFO L93 Difference]: Finished difference Result 379 states and 1005 transitions. [2021-10-13 17:58:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 17:58:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 17:58:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:58:01,295 INFO L225 Difference]: With dead ends: 379 [2021-10-13 17:58:01,295 INFO L226 Difference]: Without dead ends: 379 [2021-10-13 17:58:01,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1243.8ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-10-13 17:58:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-10-13 17:58:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 339. [2021-10-13 17:58:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.7159763313609466) internal successors, (918), 338 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 918 transitions. [2021-10-13 17:58:01,308 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 918 transitions. Word has length 33 [2021-10-13 17:58:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:58:01,308 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 918 transitions. [2021-10-13 17:58:01,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 918 transitions. [2021-10-13 17:58:01,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 17:58:01,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:58:01,310 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:58:01,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 17:58:01,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 17:58:01,525 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:58:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:58:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2142422234, now seen corresponding path program 6 times [2021-10-13 17:58:01,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:58:01,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564028934] [2021-10-13 17:58:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:58:01,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:58:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:58:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:58:02,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:58:02,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564028934] [2021-10-13 17:58:02,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564028934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:58:02,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481216978] [2021-10-13 17:58:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 17:58:02,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:58:02,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:58:02,638 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:58:02,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 17:58:03,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 17:58:03,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:58:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 17:58:03,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:58:03,014 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 55 treesize of output 53 [2021-10-13 17:58:03,278 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:58:03,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 17:58:03,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-10-13 17:58:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 17:58:03,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481216978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:58:03,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:58:03,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2021-10-13 17:58:03,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219808295] [2021-10-13 17:58:03,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 17:58:03,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:58:03,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 17:58:03,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-10-13 17:58:03,452 INFO L87 Difference]: Start difference. First operand 339 states and 918 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:58:08,671 INFO L93 Difference]: Finished difference Result 1355 states and 3782 transitions. [2021-10-13 17:58:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 17:58:08,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 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 33 [2021-10-13 17:58:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:58:08,684 INFO L225 Difference]: With dead ends: 1355 [2021-10-13 17:58:08,684 INFO L226 Difference]: Without dead ends: 1219 [2021-10-13 17:58:08,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 4658.9ms TimeCoverageRelationStatistics Valid=483, Invalid=3057, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 17:58:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-10-13 17:58:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 507. [2021-10-13 17:58:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.9031620553359683) internal successors, (1469), 506 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1469 transitions. [2021-10-13 17:58:08,714 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1469 transitions. Word has length 33 [2021-10-13 17:58:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:58:08,715 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1469 transitions. [2021-10-13 17:58:08,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1469 transitions. [2021-10-13 17:58:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 17:58:08,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:58:08,717 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:58:08,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 17:58:08,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:58:08,932 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:58:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:58:08,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1522866080, now seen corresponding path program 7 times [2021-10-13 17:58:08,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:58:08,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117842405] [2021-10-13 17:58:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:58:08,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:58:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:58:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:58:10,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:58:10,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117842405] [2021-10-13 17:58:10,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117842405] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:58:10,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167932201] [2021-10-13 17:58:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 17:58:10,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:58:10,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:58:10,122 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:58:10,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 17:58:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:58:10,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 17:58:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:58:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-10-13 17:58:10,938 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:58:10,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 17:58:12,190 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-13 17:58:12,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-10-13 17:58:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 17:58:12,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167932201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:58:12,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:58:12,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 28 [2021-10-13 17:58:12,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9045063] [2021-10-13 17:58:12,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 17:58:12,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:58:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 17:58:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-10-13 17:58:12,388 INFO L87 Difference]: Start difference. First operand 507 states and 1469 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:58:44,810 INFO L93 Difference]: Finished difference Result 1134 states and 3351 transitions. [2021-10-13 17:58:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 17:58:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 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 33 [2021-10-13 17:58:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:58:44,820 INFO L225 Difference]: With dead ends: 1134 [2021-10-13 17:58:44,821 INFO L226 Difference]: Without dead ends: 1134 [2021-10-13 17:58:44,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 8889.1ms TimeCoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 17:58:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-10-13 17:58:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 474. [2021-10-13 17:58:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.9788583509513744) internal successors, (1409), 473 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1409 transitions. [2021-10-13 17:58:44,851 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1409 transitions. Word has length 33 [2021-10-13 17:58:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:58:44,851 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1409 transitions. [2021-10-13 17:58:44,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1409 transitions. [2021-10-13 17:58:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 17:58:44,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:58:44,855 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:58:44,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 17:58:45,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 17:58:45,069 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:58:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:58:45,070 INFO L82 PathProgramCache]: Analyzing trace with hash -767312561, now seen corresponding path program 1 times [2021-10-13 17:58:45,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:58:45,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662049591] [2021-10-13 17:58:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:58:45,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:58:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:58:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 17:58:45,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:58:45,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662049591] [2021-10-13 17:58:45,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662049591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:58:45,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898205124] [2021-10-13 17:58:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:58:45,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:58:45,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:58:45,182 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:58:45,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 17:58:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:58:45,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 17:58:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:58:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 17:58:45,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898205124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:58:45,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:58:45,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-13 17:58:45,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523853209] [2021-10-13 17:58:45,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 17:58:45,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:58:45,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 17:58:45,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 17:58:45,696 INFO L87 Difference]: Start difference. First operand 474 states and 1409 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:58:45,776 INFO L93 Difference]: Finished difference Result 850 states and 2322 transitions. [2021-10-13 17:58:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 17:58:45,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 17:58:45,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:58:45,781 INFO L225 Difference]: With dead ends: 850 [2021-10-13 17:58:45,781 INFO L226 Difference]: Without dead ends: 477 [2021-10-13 17:58:45,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 17:58:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-10-13 17:58:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2021-10-13 17:58:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.966386554621849) internal successors, (1412), 476 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1412 transitions. [2021-10-13 17:58:45,797 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1412 transitions. Word has length 33 [2021-10-13 17:58:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:58:45,797 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1412 transitions. [2021-10-13 17:58:45,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:58:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1412 transitions. [2021-10-13 17:58:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 17:58:45,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:58:45,800 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:58:45,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 17:58:46,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:58:46,014 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:58:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:58:46,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2031462768, now seen corresponding path program 2 times [2021-10-13 17:58:46,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:58:46,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818693819] [2021-10-13 17:58:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:58:46,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:58:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:58:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:58:48,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:58:48,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818693819] [2021-10-13 17:58:48,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818693819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:58:48,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216553751] [2021-10-13 17:58:48,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 17:58:48,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:58:48,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:58:48,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:58:48,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 17:58:48,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 17:58:48,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:58:48,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-13 17:58:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:58:49,562 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:58:49,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-13 17:58:49,725 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:58:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-13 17:58:50,337 INFO L354 Elim1Store]: treesize reduction 9, result has 85.2 percent of original size [2021-10-13 17:58:50,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 81 [2021-10-13 17:58:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 17:58:50,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216553751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:58:50,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:58:50,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 35 [2021-10-13 17:58:50,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756970918] [2021-10-13 17:58:50,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 17:58:50,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:58:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 17:58:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 17:58:50,494 INFO L87 Difference]: Start difference. First operand 477 states and 1412 transitions. Second operand has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:59:01,605 INFO L93 Difference]: Finished difference Result 904 states and 2362 transitions. [2021-10-13 17:59:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 17:59:01,606 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 17:59:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:59:01,611 INFO L225 Difference]: With dead ends: 904 [2021-10-13 17:59:01,612 INFO L226 Difference]: Without dead ends: 692 [2021-10-13 17:59:01,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 8987.8ms TimeCoverageRelationStatistics Valid=830, Invalid=5650, Unknown=0, NotChecked=0, Total=6480 [2021-10-13 17:59:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-10-13 17:59:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 533. [2021-10-13 17:59:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.857142857142857) internal successors, (1520), 532 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1520 transitions. [2021-10-13 17:59:01,646 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1520 transitions. Word has length 34 [2021-10-13 17:59:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:59:01,647 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 1520 transitions. [2021-10-13 17:59:01,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1520 transitions. [2021-10-13 17:59:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 17:59:01,650 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:59:01,650 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:59:01,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 17:59:01,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 17:59:01,864 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:59:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:59:01,864 INFO L82 PathProgramCache]: Analyzing trace with hash -674389804, now seen corresponding path program 3 times [2021-10-13 17:59:01,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:59:01,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592617238] [2021-10-13 17:59:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:59:01,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:59:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:59:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 17:59:01,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:59:01,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592617238] [2021-10-13 17:59:01,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592617238] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:59:01,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:59:01,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 17:59:01,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138784179] [2021-10-13 17:59:01,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 17:59:01,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:59:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 17:59:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 17:59:01,938 INFO L87 Difference]: Start difference. First operand 533 states and 1520 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:01,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:59:01,968 INFO L93 Difference]: Finished difference Result 829 states and 2346 transitions. [2021-10-13 17:59:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 17:59:01,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 17:59:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:59:01,974 INFO L225 Difference]: With dead ends: 829 [2021-10-13 17:59:01,975 INFO L226 Difference]: Without dead ends: 755 [2021-10-13 17:59:01,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 17:59:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-10-13 17:59:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 505. [2021-10-13 17:59:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.128968253968254) internal successors, (1577), 504 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1577 transitions. [2021-10-13 17:59:01,999 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1577 transitions. Word has length 34 [2021-10-13 17:59:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:59:02,001 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1577 transitions. [2021-10-13 17:59:02,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1577 transitions. [2021-10-13 17:59:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 17:59:02,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:59:02,004 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:59:02,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 17:59:02,005 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:59:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:59:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 658991018, now seen corresponding path program 4 times [2021-10-13 17:59:02,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:59:02,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946163172] [2021-10-13 17:59:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:59:02,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:59:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:59:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:59:05,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:59:05,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946163172] [2021-10-13 17:59:05,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946163172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:59:05,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622987327] [2021-10-13 17:59:05,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 17:59:05,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:59:05,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:59:05,041 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:59:05,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 17:59:05,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 17:59:05,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:59:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-13 17:59:05,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:59:05,751 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-13 17:59:05,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 703 treesize of output 701 [2021-10-13 17:59:07,988 INFO L354 Elim1Store]: treesize reduction 136, result has 34.9 percent of original size [2021-10-13 17:59:07,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 72 treesize of output 128 [2021-10-13 17:59:09,352 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:59:09,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-13 17:59:10,260 INFO L354 Elim1Store]: treesize reduction 164, result has 17.2 percent of original size [2021-10-13 17:59:10,260 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 76 treesize of output 81 [2021-10-13 17:59:12,097 INFO L354 Elim1Store]: treesize reduction 170, result has 36.8 percent of original size [2021-10-13 17:59:12,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 125 treesize of output 171 [2021-10-13 17:59:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:59:13,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622987327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:59:13,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:59:13,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2021-10-13 17:59:13,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17003837] [2021-10-13 17:59:13,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 17:59:13,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:59:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 17:59:13,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1746, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 17:59:13,484 INFO L87 Difference]: Start difference. First operand 505 states and 1577 transitions. Second operand has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:59:25,494 INFO L93 Difference]: Finished difference Result 541 states and 1630 transitions. [2021-10-13 17:59:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 17:59:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 17:59:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:59:25,499 INFO L225 Difference]: With dead ends: 541 [2021-10-13 17:59:25,500 INFO L226 Difference]: Without dead ends: 496 [2021-10-13 17:59:25,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 10465.3ms TimeCoverageRelationStatistics Valid=473, Invalid=3559, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 17:59:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-10-13 17:59:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 489. [2021-10-13 17:59:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1844262295081966) internal successors, (1554), 488 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1554 transitions. [2021-10-13 17:59:25,518 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1554 transitions. Word has length 34 [2021-10-13 17:59:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:59:25,518 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1554 transitions. [2021-10-13 17:59:25,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1554 transitions. [2021-10-13 17:59:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 17:59:25,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:59:25,521 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:59:25,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 17:59:25,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-10-13 17:59:25,736 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:59:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:59:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 437737896, now seen corresponding path program 5 times [2021-10-13 17:59:25,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:59:25,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928566339] [2021-10-13 17:59:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:59:25,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:59:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:59:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:59:28,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:59:28,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928566339] [2021-10-13 17:59:28,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928566339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:59:28,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848425229] [2021-10-13 17:59:28,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 17:59:28,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:59:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:59:28,590 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:59:28,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 17:59:29,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 17:59:29,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:59:29,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-13 17:59:29,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:59:29,230 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 87 treesize of output 83 [2021-10-13 17:59:30,154 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:59:30,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 17:59:30,299 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:59:30,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 17:59:31,019 INFO L354 Elim1Store]: treesize reduction 9, result has 83.0 percent of original size [2021-10-13 17:59:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 84 [2021-10-13 17:59:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 17:59:31,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848425229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:59:31,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:59:31,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 39 [2021-10-13 17:59:31,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053141205] [2021-10-13 17:59:31,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-13 17:59:31,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:59:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-13 17:59:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 17:59:31,317 INFO L87 Difference]: Start difference. First operand 489 states and 1554 transitions. Second operand has 41 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:59:38,251 INFO L93 Difference]: Finished difference Result 1770 states and 5524 transitions. [2021-10-13 17:59:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-13 17:59:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 17:59:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:59:38,262 INFO L225 Difference]: With dead ends: 1770 [2021-10-13 17:59:38,263 INFO L226 Difference]: Without dead ends: 1707 [2021-10-13 17:59:38,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 7313.9ms TimeCoverageRelationStatistics Valid=709, Invalid=6097, Unknown=0, NotChecked=0, Total=6806 [2021-10-13 17:59:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-13 17:59:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 629. [2021-10-13 17:59:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.929936305732484) internal successors, (1840), 628 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1840 transitions. [2021-10-13 17:59:38,303 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1840 transitions. Word has length 35 [2021-10-13 17:59:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:59:38,304 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1840 transitions. [2021-10-13 17:59:38,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:59:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1840 transitions. [2021-10-13 17:59:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 17:59:38,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:59:38,307 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:59:38,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 17:59:38,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:59:38,521 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 17:59:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:59:38,522 INFO L82 PathProgramCache]: Analyzing trace with hash -934733854, now seen corresponding path program 6 times [2021-10-13 17:59:38,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:59:38,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398473441] [2021-10-13 17:59:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:59:38,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:59:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:59:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:59:40,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:59:40,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398473441] [2021-10-13 17:59:40,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398473441] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:59:40,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696360643] [2021-10-13 17:59:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 17:59:40,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:59:40,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:59:40,843 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 17:59:40,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 17:59:41,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 17:59:41,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:59:41,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-13 17:59:41,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:59:42,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 17:59:42,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 17:59:42,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 17:59:43,222 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 17:59:43,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-13 17:59:43,926 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-13 17:59:43,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 62 [2021-10-13 17:59:46,551 INFO L354 Elim1Store]: treesize reduction 15, result has 87.5 percent of original size [2021-10-13 17:59:46,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 135 [2021-10-13 17:59:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:59:47,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696360643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:59:47,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:59:47,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2021-10-13 17:59:47,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006431905] [2021-10-13 17:59:47,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-13 17:59:47,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:59:47,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-13 17:59:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1684, Unknown=1, NotChecked=0, Total=1806 [2021-10-13 17:59:47,072 INFO L87 Difference]: Start difference. First operand 629 states and 1840 transitions. Second operand has 43 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:00:10,804 INFO L93 Difference]: Finished difference Result 2762 states and 8983 transitions. [2021-10-13 18:00:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-13 18:00:10,805 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 18:00:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:00:10,822 INFO L225 Difference]: With dead ends: 2762 [2021-10-13 18:00:10,822 INFO L226 Difference]: Without dead ends: 2394 [2021-10-13 18:00:10,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2472 ImplicationChecksByTransitivity, 19595.0ms TimeCoverageRelationStatistics Valid=1162, Invalid=9139, Unknown=1, NotChecked=0, Total=10302 [2021-10-13 18:00:10,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-10-13 18:00:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 934. [2021-10-13 18:00:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2765273311897105) internal successors, (3057), 933 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3057 transitions. [2021-10-13 18:00:10,883 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3057 transitions. Word has length 35 [2021-10-13 18:00:10,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:00:10,883 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3057 transitions. [2021-10-13 18:00:10,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3057 transitions. [2021-10-13 18:00:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 18:00:10,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:00:10,887 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:00:10,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-13 18:00:11,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:00:11,100 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:00:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:00:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1320278650, now seen corresponding path program 7 times [2021-10-13 18:00:11,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:00:11,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010380431] [2021-10-13 18:00:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:00:11,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:00:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:00:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:00:14,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:00:14,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010380431] [2021-10-13 18:00:14,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010380431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:00:14,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623319452] [2021-10-13 18:00:14,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 18:00:14,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:00:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:00:14,378 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:00:14,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 18:00:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:00:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 18:00:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:00:15,165 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 954 treesize of output 938 [2021-10-13 18:00:15,839 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:00:15,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 18:00:15,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-10-13 18:00:16,345 INFO L354 Elim1Store]: treesize reduction 3, result has 85.7 percent of original size [2021-10-13 18:00:16,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2021-10-13 18:00:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 18:00:16,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623319452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:00:16,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:00:16,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 37 [2021-10-13 18:00:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103957977] [2021-10-13 18:00:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 18:00:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:00:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 18:00:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 18:00:16,473 INFO L87 Difference]: Start difference. First operand 934 states and 3057 transitions. Second operand has 39 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:00:22,238 INFO L93 Difference]: Finished difference Result 1160 states and 3393 transitions. [2021-10-13 18:00:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 18:00:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 18:00:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:00:22,245 INFO L225 Difference]: With dead ends: 1160 [2021-10-13 18:00:22,245 INFO L226 Difference]: Without dead ends: 1055 [2021-10-13 18:00:22,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 6593.4ms TimeCoverageRelationStatistics Valid=695, Invalid=4561, Unknown=0, NotChecked=0, Total=5256 [2021-10-13 18:00:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-10-13 18:00:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 929. [2021-10-13 18:00:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.2823275862068964) internal successors, (3046), 928 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3046 transitions. [2021-10-13 18:00:22,281 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3046 transitions. Word has length 35 [2021-10-13 18:00:22,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:00:22,281 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 3046 transitions. [2021-10-13 18:00:22,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:22,282 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3046 transitions. [2021-10-13 18:00:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 18:00:22,285 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:00:22,285 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:00:22,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 18:00:22,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 18:00:22,500 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:00:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:00:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -948317056, now seen corresponding path program 8 times [2021-10-13 18:00:22,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:00:22,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598491969] [2021-10-13 18:00:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:00:22,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:00:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:00:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:00:25,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:00:25,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598491969] [2021-10-13 18:00:25,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598491969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:00:25,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426349232] [2021-10-13 18:00:25,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 18:00:25,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:00:25,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:00:25,923 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:00:25,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 18:00:26,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 18:00:26,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:00:26,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-13 18:00:26,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:00:26,756 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 141 treesize of output 133 [2021-10-13 18:00:28,103 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:00:28,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 18:00:28,797 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-13 18:00:28,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 56 [2021-10-13 18:00:29,378 INFO L354 Elim1Store]: treesize reduction 13, result has 79.4 percent of original size [2021-10-13 18:00:29,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 79 [2021-10-13 18:00:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:00:29,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426349232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:00:29,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:00:29,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 44 [2021-10-13 18:00:29,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613895306] [2021-10-13 18:00:29,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-13 18:00:29,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:00:29,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-13 18:00:29,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1902, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 18:00:29,823 INFO L87 Difference]: Start difference. First operand 929 states and 3046 transitions. Second operand has 46 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:00:37,362 INFO L93 Difference]: Finished difference Result 985 states and 3127 transitions. [2021-10-13 18:00:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 18:00:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 18:00:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:00:37,370 INFO L225 Difference]: With dead ends: 985 [2021-10-13 18:00:37,370 INFO L226 Difference]: Without dead ends: 940 [2021-10-13 18:00:37,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 8542.9ms TimeCoverageRelationStatistics Valid=506, Invalid=3916, Unknown=0, NotChecked=0, Total=4422 [2021-10-13 18:00:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-10-13 18:00:37,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 930. [2021-10-13 18:00:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.2809472551130248) internal successors, (3048), 929 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 3048 transitions. [2021-10-13 18:00:37,406 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 3048 transitions. Word has length 35 [2021-10-13 18:00:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:00:37,407 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 3048 transitions. [2021-10-13 18:00:37,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 3048 transitions. [2021-10-13 18:00:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 18:00:37,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:00:37,411 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:00:37,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-13 18:00:37,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:00:37,626 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:00:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:00:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1521680297, now seen corresponding path program 9 times [2021-10-13 18:00:37,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:00:37,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358797660] [2021-10-13 18:00:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:00:37,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:00:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:00:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:00:41,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:00:41,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358797660] [2021-10-13 18:00:41,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358797660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:00:41,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202020877] [2021-10-13 18:00:41,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 18:00:41,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:00:41,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:00:41,238 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:00:41,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 18:00:42,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 18:00:42,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:00:42,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-13 18:00:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:00:42,209 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 55 treesize of output 53 [2021-10-13 18:00:43,385 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:00:43,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 18:00:43,967 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-13 18:00:43,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-10-13 18:00:44,898 INFO L354 Elim1Store]: treesize reduction 69, result has 34.3 percent of original size [2021-10-13 18:00:44,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 80 [2021-10-13 18:00:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 18:00:45,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202020877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:00:45,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:00:45,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 41 [2021-10-13 18:00:45,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462654512] [2021-10-13 18:00:45,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-13 18:00:45,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:00:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-13 18:00:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1667, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 18:00:45,061 INFO L87 Difference]: Start difference. First operand 930 states and 3048 transitions. Second operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:00:53,695 INFO L93 Difference]: Finished difference Result 1029 states and 3191 transitions. [2021-10-13 18:00:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 18:00:53,695 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 18:00:53,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:00:53,700 INFO L225 Difference]: With dead ends: 1029 [2021-10-13 18:00:53,700 INFO L226 Difference]: Without dead ends: 934 [2021-10-13 18:00:53,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 10160.5ms TimeCoverageRelationStatistics Valid=574, Invalid=4396, Unknown=0, NotChecked=0, Total=4970 [2021-10-13 18:00:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-10-13 18:00:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 930. [2021-10-13 18:00:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.279870828848224) internal successors, (3047), 929 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 3047 transitions. [2021-10-13 18:00:53,747 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 3047 transitions. Word has length 35 [2021-10-13 18:00:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:00:53,747 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 3047 transitions. [2021-10-13 18:00:53,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:00:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 3047 transitions. [2021-10-13 18:00:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 18:00:53,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:00:53,751 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:00:53,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 18:00:53,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:00:53,966 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:00:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:00:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1736676082, now seen corresponding path program 10 times [2021-10-13 18:00:53,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:00:53,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052737869] [2021-10-13 18:00:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:00:53,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:00:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:00:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:00:57,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:00:57,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052737869] [2021-10-13 18:00:57,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052737869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:00:57,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321049084] [2021-10-13 18:00:57,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 18:00:57,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:00:57,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:00:57,156 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:00:57,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 18:00:58,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 18:00:58,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:00:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 18:00:58,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:00:58,191 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 55 treesize of output 53 [2021-10-13 18:00:58,660 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:00:58,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 18:00:58,797 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:00:58,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 18:00:59,738 INFO L354 Elim1Store]: treesize reduction 176, result has 39.1 percent of original size [2021-10-13 18:00:59,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 100 treesize of output 164 [2021-10-13 18:01:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 18:01:00,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321049084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:00,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:01:00,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 35 [2021-10-13 18:01:00,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514223450] [2021-10-13 18:01:00,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 18:01:00,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:01:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 18:01:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 18:01:00,066 INFO L87 Difference]: Start difference. First operand 930 states and 3047 transitions. Second operand has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:01:08,569 INFO L93 Difference]: Finished difference Result 2224 states and 6901 transitions. [2021-10-13 18:01:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 18:01:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 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 36 [2021-10-13 18:01:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:01:08,578 INFO L225 Difference]: With dead ends: 2224 [2021-10-13 18:01:08,579 INFO L226 Difference]: Without dead ends: 2161 [2021-10-13 18:01:08,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 8909.1ms TimeCoverageRelationStatistics Valid=1076, Invalid=5404, Unknown=0, NotChecked=0, Total=6480 [2021-10-13 18:01:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-10-13 18:01:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 900. [2021-10-13 18:01:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.3081201334816464) internal successors, (2974), 899 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2974 transitions. [2021-10-13 18:01:08,625 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2974 transitions. Word has length 36 [2021-10-13 18:01:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:01:08,626 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2974 transitions. [2021-10-13 18:01:08,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2974 transitions. [2021-10-13 18:01:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 18:01:08,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:01:08,629 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:01:08,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-13 18:01:08,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 18:01:08,844 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:01:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:01:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1185819464, now seen corresponding path program 11 times [2021-10-13 18:01:08,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:01:08,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381975340] [2021-10-13 18:01:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:01:08,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:01:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:01:12,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:01:12,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381975340] [2021-10-13 18:01:12,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381975340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:12,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598588675] [2021-10-13 18:01:12,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 18:01:12,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:12,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:01:12,242 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:01:12,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 18:01:13,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 18:01:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:01:13,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 18:01:13,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:01:13,365 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 55 treesize of output 53 [2021-10-13 18:01:14,044 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:01:14,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 18:01:14,639 INFO L354 Elim1Store]: treesize reduction 164, result has 17.2 percent of original size [2021-10-13 18:01:14,640 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 72 treesize of output 77 [2021-10-13 18:01:15,346 INFO L354 Elim1Store]: treesize reduction 135, result has 30.1 percent of original size [2021-10-13 18:01:15,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 96 [2021-10-13 18:01:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 18:01:15,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598588675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:15,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:01:15,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 36 [2021-10-13 18:01:15,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066100262] [2021-10-13 18:01:15,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 18:01:15,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:01:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 18:01:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1278, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 18:01:15,452 INFO L87 Difference]: Start difference. First operand 900 states and 2974 transitions. Second operand has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:01:21,147 INFO L93 Difference]: Finished difference Result 1391 states and 4537 transitions. [2021-10-13 18:01:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 18:01:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 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 36 [2021-10-13 18:01:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:01:21,152 INFO L225 Difference]: With dead ends: 1391 [2021-10-13 18:01:21,152 INFO L226 Difference]: Without dead ends: 1313 [2021-10-13 18:01:21,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 6636.9ms TimeCoverageRelationStatistics Valid=556, Invalid=3604, Unknown=0, NotChecked=0, Total=4160 [2021-10-13 18:01:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-10-13 18:01:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 838. [2021-10-13 18:01:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4396654719235364) internal successors, (2879), 837 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2879 transitions. [2021-10-13 18:01:21,184 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2879 transitions. Word has length 36 [2021-10-13 18:01:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:01:21,184 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 2879 transitions. [2021-10-13 18:01:21,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2879 transitions. [2021-10-13 18:01:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 18:01:21,188 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:01:21,188 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:01:21,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 18:01:21,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 18:01:21,403 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:01:21,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:01:21,404 INFO L82 PathProgramCache]: Analyzing trace with hash 566099872, now seen corresponding path program 12 times [2021-10-13 18:01:21,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:01:21,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412317046] [2021-10-13 18:01:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:01:21,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:01:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 18:01:21,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:01:21,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412317046] [2021-10-13 18:01:21,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412317046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:21,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281762634] [2021-10-13 18:01:21,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 18:01:21,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:21,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:01:21,500 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:01:21,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 18:01:22,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 18:01:22,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:01:22,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 18:01:22,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:01:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 18:01:22,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281762634] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:01:22,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 18:01:22,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-10-13 18:01:22,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843057947] [2021-10-13 18:01:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 18:01:22,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:01:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 18:01:22,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 18:01:22,727 INFO L87 Difference]: Start difference. First operand 838 states and 2879 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:01:22,747 INFO L93 Difference]: Finished difference Result 288 states and 539 transitions. [2021-10-13 18:01:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 18:01:22,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-13 18:01:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:01:22,749 INFO L225 Difference]: With dead ends: 288 [2021-10-13 18:01:22,749 INFO L226 Difference]: Without dead ends: 280 [2021-10-13 18:01:22,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 18:01:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-13 18:01:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 270. [2021-10-13 18:01:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.9144981412639406) internal successors, (515), 269 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 515 transitions. [2021-10-13 18:01:22,757 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 515 transitions. Word has length 37 [2021-10-13 18:01:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:01:22,758 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 515 transitions. [2021-10-13 18:01:22,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 515 transitions. [2021-10-13 18:01:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 18:01:22,760 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:01:22,760 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:01:22,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 18:01:22,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 18:01:22,974 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:01:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:01:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash 388962326, now seen corresponding path program 13 times [2021-10-13 18:01:22,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:01:22,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194404373] [2021-10-13 18:01:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:01:22,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:01:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 18:01:23,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:01:23,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194404373] [2021-10-13 18:01:23,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194404373] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:23,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254658546] [2021-10-13 18:01:23,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 18:01:23,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:23,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:01:23,351 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:01:23,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 18:01:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:24,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 18:01:24,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:01:24,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-10-13 18:01:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 18:01:24,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254658546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:24,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:01:24,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-10-13 18:01:24,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857340875] [2021-10-13 18:01:24,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 18:01:24,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:01:24,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 18:01:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-10-13 18:01:24,971 INFO L87 Difference]: Start difference. First operand 270 states and 515 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:01:25,476 INFO L93 Difference]: Finished difference Result 407 states and 746 transitions. [2021-10-13 18:01:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 18:01:25,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 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 37 [2021-10-13 18:01:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:01:25,478 INFO L225 Difference]: With dead ends: 407 [2021-10-13 18:01:25,478 INFO L226 Difference]: Without dead ends: 304 [2021-10-13 18:01:25,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-10-13 18:01:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-13 18:01:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 266. [2021-10-13 18:01:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.8943396226415095) internal successors, (502), 265 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 502 transitions. [2021-10-13 18:01:25,486 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 502 transitions. Word has length 37 [2021-10-13 18:01:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:01:25,487 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 502 transitions. [2021-10-13 18:01:25,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 502 transitions. [2021-10-13 18:01:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 18:01:25,488 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:01:25,489 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:01:25,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 18:01:25,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 18:01:25,703 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:01:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:01:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1700209442, now seen corresponding path program 14 times [2021-10-13 18:01:25,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:01:25,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305784720] [2021-10-13 18:01:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:01:25,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:01:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 18:01:26,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:01:26,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305784720] [2021-10-13 18:01:26,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305784720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:26,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423060216] [2021-10-13 18:01:26,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 18:01:26,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:26,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:01:26,317 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:01:26,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 18:01:27,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 18:01:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:01:27,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 18:01:27,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:01:27,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-10-13 18:01:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 18:01:27,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423060216] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:27,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:01:27,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 20 [2021-10-13 18:01:27,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904726693] [2021-10-13 18:01:27,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 18:01:27,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:01:27,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 18:01:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-10-13 18:01:27,638 INFO L87 Difference]: Start difference. First operand 266 states and 502 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:01:30,818 INFO L93 Difference]: Finished difference Result 938 states and 1713 transitions. [2021-10-13 18:01:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 18:01:30,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 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 38 [2021-10-13 18:01:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:01:30,821 INFO L225 Difference]: With dead ends: 938 [2021-10-13 18:01:30,821 INFO L226 Difference]: Without dead ends: 938 [2021-10-13 18:01:30,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2385.7ms TimeCoverageRelationStatistics Valid=582, Invalid=3974, Unknown=0, NotChecked=0, Total=4556 [2021-10-13 18:01:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-10-13 18:01:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 260. [2021-10-13 18:01:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.8957528957528957) internal successors, (491), 259 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 491 transitions. [2021-10-13 18:01:30,831 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 491 transitions. Word has length 38 [2021-10-13 18:01:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:01:30,831 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 491 transitions. [2021-10-13 18:01:30,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 491 transitions. [2021-10-13 18:01:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 18:01:30,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:01:30,833 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:01:30,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 18:01:31,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:31,047 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:01:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:01:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash 795710970, now seen corresponding path program 15 times [2021-10-13 18:01:31,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:01:31,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144619900] [2021-10-13 18:01:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:01:31,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:01:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 18:01:31,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:01:31,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144619900] [2021-10-13 18:01:31,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144619900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:31,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198565735] [2021-10-13 18:01:31,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 18:01:31,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:31,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:01:31,145 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:01:31,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 18:01:32,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 18:01:32,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:01:32,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 18:01:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:01:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 18:01:32,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198565735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:32,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:01:32,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-13 18:01:32,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160852386] [2021-10-13 18:01:32,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 18:01:32,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:01:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 18:01:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-13 18:01:32,615 INFO L87 Difference]: Start difference. First operand 260 states and 491 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) [2021-10-13 18:01:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:01:32,725 INFO L93 Difference]: Finished difference Result 361 states and 673 transitions. [2021-10-13 18:01:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 18:01:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) Word has length 40 [2021-10-13 18:01:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:01:32,726 INFO L225 Difference]: With dead ends: 361 [2021-10-13 18:01:32,726 INFO L226 Difference]: Without dead ends: 192 [2021-10-13 18:01:32,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-13 18:01:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-13 18:01:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-10-13 18:01:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.8638743455497382) internal successors, (356), 191 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 356 transitions. [2021-10-13 18:01:32,731 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 356 transitions. Word has length 40 [2021-10-13 18:01:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:01:32,731 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 356 transitions. [2021-10-13 18:01:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) [2021-10-13 18:01:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 356 transitions. [2021-10-13 18:01:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 18:01:32,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:01:32,733 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:01:32,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 18:01:32,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-13 18:01:32,949 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:01:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:01:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2022888344, now seen corresponding path program 16 times [2021-10-13 18:01:32,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:01:32,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014963177] [2021-10-13 18:01:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:01:32,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:01:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 18:01:34,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:01:34,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014963177] [2021-10-13 18:01:34,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014963177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:34,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985423474] [2021-10-13 18:01:34,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 18:01:34,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:34,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:01:34,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:01:34,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 18:01:35,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 18:01:35,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:01:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-13 18:01:35,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:01:37,583 INFO L354 Elim1Store]: treesize reduction 3, result has 96.6 percent of original size [2021-10-13 18:01:37,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 133 [2021-10-13 18:01:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:01:38,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985423474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:38,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:01:38,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 43 [2021-10-13 18:01:38,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325670148] [2021-10-13 18:01:38,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 18:01:38,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:01:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 18:01:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 18:01:38,189 INFO L87 Difference]: Start difference. First operand 192 states and 356 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:01:47,043 INFO L93 Difference]: Finished difference Result 403 states and 736 transitions. [2021-10-13 18:01:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 18:01:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-13 18:01:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:01:47,047 INFO L225 Difference]: With dead ends: 403 [2021-10-13 18:01:47,047 INFO L226 Difference]: Without dead ends: 379 [2021-10-13 18:01:47,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 9540.9ms TimeCoverageRelationStatistics Valid=868, Invalid=5938, Unknown=0, NotChecked=0, Total=6806 [2021-10-13 18:01:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-10-13 18:01:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 261. [2021-10-13 18:01:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.8923076923076922) internal successors, (492), 260 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 492 transitions. [2021-10-13 18:01:47,054 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 492 transitions. Word has length 40 [2021-10-13 18:01:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:01:47,054 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 492 transitions. [2021-10-13 18:01:47,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 492 transitions. [2021-10-13 18:01:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 18:01:47,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:01:47,055 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:01:47,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 18:01:47,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:47,257 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:01:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:01:47,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1877834192, now seen corresponding path program 17 times [2021-10-13 18:01:47,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:01:47,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75900182] [2021-10-13 18:01:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:01:47,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:01:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 18:01:48,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:01:48,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75900182] [2021-10-13 18:01:48,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75900182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:48,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608814478] [2021-10-13 18:01:48,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 18:01:48,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:48,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:01:48,451 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:01:48,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 18:01:49,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 18:01:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:01:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 18:01:49,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:01:50,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-10-13 18:01:50,720 INFO L354 Elim1Store]: treesize reduction 11, result has 80.7 percent of original size [2021-10-13 18:01:50,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 75 [2021-10-13 18:01:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 18:01:50,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608814478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:50,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:01:50,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 37 [2021-10-13 18:01:50,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666356878] [2021-10-13 18:01:50,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 18:01:50,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:01:50,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 18:01:50,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 18:01:50,838 INFO L87 Difference]: Start difference. First operand 261 states and 492 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:01:56,009 INFO L93 Difference]: Finished difference Result 802 states and 1483 transitions. [2021-10-13 18:01:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 18:01:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 18:01:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:01:56,012 INFO L225 Difference]: With dead ends: 802 [2021-10-13 18:01:56,012 INFO L226 Difference]: Without dead ends: 778 [2021-10-13 18:01:56,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 4016.7ms TimeCoverageRelationStatistics Valid=486, Invalid=4484, Unknown=0, NotChecked=0, Total=4970 [2021-10-13 18:01:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-10-13 18:01:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 334. [2021-10-13 18:01:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.90990990990991) internal successors, (636), 333 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 636 transitions. [2021-10-13 18:01:56,023 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 636 transitions. Word has length 41 [2021-10-13 18:01:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:01:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 636 transitions. [2021-10-13 18:01:56,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:01:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 636 transitions. [2021-10-13 18:01:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 18:01:56,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:01:56,025 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:01:56,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 18:01:56,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:56,227 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:01:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:01:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1265627122, now seen corresponding path program 18 times [2021-10-13 18:01:56,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:01:56,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930807097] [2021-10-13 18:01:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:01:56,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:01:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:01:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 18:01:57,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:01:57,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930807097] [2021-10-13 18:01:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930807097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:01:57,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105460730] [2021-10-13 18:01:57,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 18:01:57,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:01:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:01:57,714 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:01:57,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 18:01:59,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 18:01:59,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:01:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 18:01:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:02:00,023 INFO L354 Elim1Store]: treesize reduction 10, result has 83.1 percent of original size [2021-10-13 18:02:00,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 76 [2021-10-13 18:02:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 18:02:00,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105460730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:02:00,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:02:00,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 36 [2021-10-13 18:02:00,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31122205] [2021-10-13 18:02:00,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 18:02:00,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:02:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 18:02:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 18:02:00,142 INFO L87 Difference]: Start difference. First operand 334 states and 636 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:02:11,568 INFO L93 Difference]: Finished difference Result 469 states and 866 transitions. [2021-10-13 18:02:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 18:02:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 18:02:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:02:11,571 INFO L225 Difference]: With dead ends: 469 [2021-10-13 18:02:11,571 INFO L226 Difference]: Without dead ends: 461 [2021-10-13 18:02:11,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 7306.8ms TimeCoverageRelationStatistics Valid=500, Invalid=3920, Unknown=2, NotChecked=0, Total=4422 [2021-10-13 18:02:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-10-13 18:02:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 265. [2021-10-13 18:02:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.8863636363636365) internal successors, (498), 264 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 498 transitions. [2021-10-13 18:02:11,579 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 498 transitions. Word has length 41 [2021-10-13 18:02:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:02:11,579 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 498 transitions. [2021-10-13 18:02:11,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 498 transitions. [2021-10-13 18:02:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 18:02:11,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:02:11,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:02:11,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 18:02:11,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-13 18:02:11,796 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:02:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:02:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1550434367, now seen corresponding path program 19 times [2021-10-13 18:02:11,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:02:11,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048146829] [2021-10-13 18:02:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:02:11,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:02:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:02:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 18:02:11,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:02:11,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048146829] [2021-10-13 18:02:11,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048146829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:02:11,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796167573] [2021-10-13 18:02:11,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 18:02:11,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:02:11,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:02:11,902 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:02:11,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 18:02:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:02:13,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 18:02:13,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:02:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 18:02:13,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796167573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:02:13,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:02:13,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-13 18:02:13,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779273616] [2021-10-13 18:02:13,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 18:02:13,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:02:13,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 18:02:13,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 18:02:13,385 INFO L87 Difference]: Start difference. First operand 265 states and 498 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:02:13,493 INFO L93 Difference]: Finished difference Result 521 states and 978 transitions. [2021-10-13 18:02:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 18:02:13,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 18:02:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:02:13,495 INFO L225 Difference]: With dead ends: 521 [2021-10-13 18:02:13,495 INFO L226 Difference]: Without dead ends: 353 [2021-10-13 18:02:13,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-13 18:02:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-13 18:02:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 333. [2021-10-13 18:02:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.9036144578313252) internal successors, (632), 332 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 632 transitions. [2021-10-13 18:02:13,503 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 632 transitions. Word has length 41 [2021-10-13 18:02:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:02:13,504 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 632 transitions. [2021-10-13 18:02:13,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 632 transitions. [2021-10-13 18:02:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 18:02:13,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:02:13,506 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:02:13,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-13 18:02:13,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-13 18:02:13,720 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:02:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:02:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1063915706, now seen corresponding path program 20 times [2021-10-13 18:02:13,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:02:13,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80748992] [2021-10-13 18:02:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:02:13,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:02:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:02:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 18:02:15,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:02:15,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80748992] [2021-10-13 18:02:15,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80748992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:02:15,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062766395] [2021-10-13 18:02:15,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 18:02:15,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:02:15,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:02:15,471 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:02:15,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 18:02:16,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 18:02:16,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:02:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 18:02:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:02:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 18:02:17,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062766395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:02:17,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:02:17,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 31 [2021-10-13 18:02:17,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542423181] [2021-10-13 18:02:17,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 18:02:17,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:02:17,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 18:02:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-10-13 18:02:17,369 INFO L87 Difference]: Start difference. First operand 333 states and 632 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:02:30,151 INFO L93 Difference]: Finished difference Result 1020 states and 1900 transitions. [2021-10-13 18:02:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-13 18:02:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-13 18:02:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:02:30,153 INFO L225 Difference]: With dead ends: 1020 [2021-10-13 18:02:30,153 INFO L226 Difference]: Without dead ends: 830 [2021-10-13 18:02:30,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 7207.2ms TimeCoverageRelationStatistics Valid=713, Invalid=6597, Unknown=0, NotChecked=0, Total=7310 [2021-10-13 18:02:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-10-13 18:02:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 182. [2021-10-13 18:02:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.8453038674033149) internal successors, (334), 181 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 334 transitions. [2021-10-13 18:02:30,161 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 334 transitions. Word has length 42 [2021-10-13 18:02:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:02:30,162 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 334 transitions. [2021-10-13 18:02:30,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 334 transitions. [2021-10-13 18:02:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 18:02:30,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:02:30,163 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:02:30,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 18:02:30,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:02:30,378 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:02:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:02:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1528632606, now seen corresponding path program 21 times [2021-10-13 18:02:30,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:02:30,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364050162] [2021-10-13 18:02:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:02:30,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:02:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:02:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:02:34,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:02:34,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364050162] [2021-10-13 18:02:34,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364050162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:02:34,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241843584] [2021-10-13 18:02:34,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 18:02:34,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:02:34,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:02:34,030 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:02:34,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 18:02:35,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 18:02:35,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:02:35,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-13 18:02:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:02:36,792 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 18:02:36,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-10-13 18:02:36,981 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 18:02:36,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-10-13 18:02:39,315 INFO L354 Elim1Store]: treesize reduction 154, result has 61.6 percent of original size [2021-10-13 18:02:39,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 181 treesize of output 312 [2021-10-13 18:02:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 18:02:41,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241843584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:02:41,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:02:41,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-10-13 18:02:41,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654097389] [2021-10-13 18:02:41,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-13 18:02:41,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:02:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-13 18:02:41,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2902, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 18:02:41,428 INFO L87 Difference]: Start difference. First operand 182 states and 334 transitions. Second operand has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:02:53,609 INFO L93 Difference]: Finished difference Result 556 states and 992 transitions. [2021-10-13 18:02:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-13 18:02:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 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 42 [2021-10-13 18:02:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:02:53,611 INFO L225 Difference]: With dead ends: 556 [2021-10-13 18:02:53,611 INFO L226 Difference]: Without dead ends: 460 [2021-10-13 18:02:53,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 13631.1ms TimeCoverageRelationStatistics Valid=977, Invalid=10795, Unknown=0, NotChecked=0, Total=11772 [2021-10-13 18:02:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-13 18:02:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 262. [2021-10-13 18:02:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.8582375478927202) internal successors, (485), 261 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 485 transitions. [2021-10-13 18:02:53,620 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 485 transitions. Word has length 42 [2021-10-13 18:02:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:02:53,621 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 485 transitions. [2021-10-13 18:02:53,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:02:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 485 transitions. [2021-10-13 18:02:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 18:02:53,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:02:53,623 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:02:53,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 18:02:53,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-13 18:02:53,837 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:02:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:02:53,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1707635358, now seen corresponding path program 22 times [2021-10-13 18:02:53,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:02:53,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33668035] [2021-10-13 18:02:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:02:53,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:02:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:02:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:02:57,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:02:57,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33668035] [2021-10-13 18:02:57,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33668035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:02:57,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863538720] [2021-10-13 18:02:57,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 18:02:57,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:02:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:02:57,963 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:02:57,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-13 18:02:59,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 18:02:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:02:59,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 113 conjunts are in the unsatisfiable core [2021-10-13 18:02:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:02:59,712 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-13 18:02:59,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 1483 treesize of output 1449 [2021-10-13 18:03:03,300 INFO L354 Elim1Store]: treesize reduction 136, result has 34.9 percent of original size [2021-10-13 18:03:03,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 72 treesize of output 128 [2021-10-13 18:03:05,062 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 18:03:05,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-10-13 18:03:05,875 INFO L354 Elim1Store]: treesize reduction 132, result has 21.4 percent of original size [2021-10-13 18:03:05,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 67 [2021-10-13 18:03:09,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 18:03:09,727 INFO L354 Elim1Store]: treesize reduction 846, result has 29.5 percent of original size [2021-10-13 18:03:09,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 205 treesize of output 449 [2021-10-13 18:03:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:03:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863538720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:03:36,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:03:36,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2021-10-13 18:03:36,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135187151] [2021-10-13 18:03:36,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-13 18:03:36,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:03:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-13 18:03:36,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3228, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 18:03:36,736 INFO L87 Difference]: Start difference. First operand 262 states and 485 transitions. Second operand has 59 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:03:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:03:47,227 INFO L93 Difference]: Finished difference Result 314 states and 562 transitions. [2021-10-13 18:03:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 18:03:47,228 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-13 18:03:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:03:47,229 INFO L225 Difference]: With dead ends: 314 [2021-10-13 18:03:47,229 INFO L226 Difference]: Without dead ends: 259 [2021-10-13 18:03:47,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 14035.4ms TimeCoverageRelationStatistics Valid=692, Invalid=6964, Unknown=0, NotChecked=0, Total=7656 [2021-10-13 18:03:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-13 18:03:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 245. [2021-10-13 18:03:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.889344262295082) internal successors, (461), 244 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:03:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 461 transitions. [2021-10-13 18:03:47,235 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 461 transitions. Word has length 42 [2021-10-13 18:03:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:03:47,236 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 461 transitions. [2021-10-13 18:03:47,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:03:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 461 transitions. [2021-10-13 18:03:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 18:03:47,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:03:47,238 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:03:47,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-13 18:03:47,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 18:03:47,449 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:03:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:03:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash 629245338, now seen corresponding path program 23 times [2021-10-13 18:03:47,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:03:47,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513788644] [2021-10-13 18:03:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:03:47,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:03:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:03:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:03:53,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:03:53,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513788644] [2021-10-13 18:03:53,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513788644] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:03:53,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416534451] [2021-10-13 18:03:53,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 18:03:53,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:03:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:03:53,134 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:03:53,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-13 18:03:55,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 18:03:55,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:03:55,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-13 18:03:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:03:55,143 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 141 treesize of output 133 [2021-10-13 18:03:56,670 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:03:56,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 18:03:57,299 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-13 18:03:57,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 49 [2021-10-13 18:03:59,612 INFO L354 Elim1Store]: treesize reduction 146, result has 71.3 percent of original size [2021-10-13 18:03:59,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 164 treesize of output 420 [2021-10-13 18:04:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 18:04:52,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416534451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:04:52,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:04:52,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 55 [2021-10-13 18:04:52,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969400964] [2021-10-13 18:04:52,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-13 18:04:52,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:04:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-13 18:04:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3010, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 18:04:52,003 INFO L87 Difference]: Start difference. First operand 245 states and 461 transitions. Second operand has 57 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:05:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:05:05,477 INFO L93 Difference]: Finished difference Result 565 states and 979 transitions. [2021-10-13 18:05:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-13 18:05:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 states have internal predecessors, (76), 0 states have call successors, (0), 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 43 [2021-10-13 18:05:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:05:05,479 INFO L225 Difference]: With dead ends: 565 [2021-10-13 18:05:05,479 INFO L226 Difference]: Without dead ends: 481 [2021-10-13 18:05:05,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 15250.7ms TimeCoverageRelationStatistics Valid=965, Invalid=12145, Unknown=0, NotChecked=0, Total=13110 [2021-10-13 18:05:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-10-13 18:05:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 322. [2021-10-13 18:05:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.8909657320872275) internal successors, (607), 321 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:05:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 607 transitions. [2021-10-13 18:05:05,491 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 607 transitions. Word has length 43 [2021-10-13 18:05:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:05:05,492 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 607 transitions. [2021-10-13 18:05:05,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:05:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 607 transitions. [2021-10-13 18:05:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 18:05:05,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:05:05,502 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:05:05,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-13 18:05:05,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 18:05:05,708 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:05:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:05:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash -349928712, now seen corresponding path program 24 times [2021-10-13 18:05:05,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:05:05,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146294363] [2021-10-13 18:05:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:05:05,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:05:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:05:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:05:10,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:05:10,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146294363] [2021-10-13 18:05:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146294363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:05:10,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127053789] [2021-10-13 18:05:10,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 18:05:10,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:05:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:05:10,466 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:05:10,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 18:05:12,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 18:05:12,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:05:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-13 18:05:12,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:05:13,920 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:05:13,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-13 18:05:14,114 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 18:05:14,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-13 18:05:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 18:05:16,763 INFO L354 Elim1Store]: treesize reduction 130, result has 64.6 percent of original size [2021-10-13 18:05:16,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 157 treesize of output 291 [2021-10-13 18:05:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 18:05:17,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127053789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:05:17,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:05:17,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 54 [2021-10-13 18:05:17,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104189318] [2021-10-13 18:05:17,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-13 18:05:17,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:05:17,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-13 18:05:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2864, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 18:05:17,946 INFO L87 Difference]: Start difference. First operand 322 states and 607 transitions. Second operand has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:05:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:05:30,908 INFO L93 Difference]: Finished difference Result 738 states and 1324 transitions. [2021-10-13 18:05:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-13 18:05:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 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 43 [2021-10-13 18:05:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:05:30,910 INFO L225 Difference]: With dead ends: 738 [2021-10-13 18:05:30,910 INFO L226 Difference]: Without dead ends: 578 [2021-10-13 18:05:30,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3047 ImplicationChecksByTransitivity, 15121.5ms TimeCoverageRelationStatistics Valid=1459, Invalid=12113, Unknown=0, NotChecked=0, Total=13572 [2021-10-13 18:05:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-10-13 18:05:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 340. [2021-10-13 18:05:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.864306784660767) internal successors, (632), 339 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:05:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 632 transitions. [2021-10-13 18:05:30,921 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 632 transitions. Word has length 43 [2021-10-13 18:05:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:05:30,921 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 632 transitions. [2021-10-13 18:05:30,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:05:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 632 transitions. [2021-10-13 18:05:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 18:05:30,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:05:30,923 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:05:30,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 18:05:31,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 18:05:31,127 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-13 18:05:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:05:31,128 INFO L82 PathProgramCache]: Analyzing trace with hash 708770620, now seen corresponding path program 25 times [2021-10-13 18:05:31,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:05:31,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695087439] [2021-10-13 18:05:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:05:31,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:05:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:05:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:05:36,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:05:36,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695087439] [2021-10-13 18:05:36,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695087439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:05:36,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129631120] [2021-10-13 18:05:36,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 18:05:36,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:05:36,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:05:36,366 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:05:36,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 18:05:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:05:38,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 88 conjunts are in the unsatisfiable core [2021-10-13 18:05:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:05:38,498 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-13 18:05:38,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 108 [2021-10-13 18:05:40,788 INFO L354 Elim1Store]: treesize reduction 136, result has 34.9 percent of original size [2021-10-13 18:05:40,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 72 treesize of output 128 [2021-10-13 18:05:42,023 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 18:05:42,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-10-13 18:05:42,544 INFO L354 Elim1Store]: treesize reduction 75, result has 24.2 percent of original size [2021-10-13 18:05:42,545 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 2 case distinctions, treesize of input 54 treesize of output 47 [2021-10-13 18:05:44,236 INFO L354 Elim1Store]: treesize reduction 197, result has 35.2 percent of original size [2021-10-13 18:05:44,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 152 treesize of output 147 [2021-10-13 18:05:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 18:05:44,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129631120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:05:44,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:05:44,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23] total 53 [2021-10-13 18:05:44,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053001805] [2021-10-13 18:05:44,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-13 18:05:44,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:05:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-13 18:05:44,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2814, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 18:05:44,309 INFO L87 Difference]: Start difference. First operand 340 states and 632 transitions. Second operand has 55 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:06:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:06:03,236 INFO L93 Difference]: Finished difference Result 511 states and 919 transitions. [2021-10-13 18:06:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-13 18:06:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 0 states have call successors, (0), 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 43 [2021-10-13 18:06:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:06:03,237 INFO L225 Difference]: With dead ends: 511 [2021-10-13 18:06:03,237 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 18:06:03,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 19577.1ms TimeCoverageRelationStatistics Valid=1058, Invalid=11824, Unknown=0, NotChecked=0, Total=12882 [2021-10-13 18:06:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 18:06:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 18:06:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:06:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 18:06:03,240 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-10-13 18:06:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:06:03,240 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 18:06:03,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:06:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 18:06:03,241 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 18:06:03,244 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 18:06:03,245 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 18:06:03,245 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 18:06:03,245 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 18:06:03,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-13 18:06:03,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:06:03,462 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 18:06:03,462 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 18:06:03,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:06:03 BasicIcfg [2021-10-13 18:06:03,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 18:06:03,466 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 18:06:03,467 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 18:06:03,467 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 18:06:03,467 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:57:04" (3/4) ... [2021-10-13 18:06:03,470 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 18:06:03,476 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-13 18:06:03,476 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-13 18:06:03,476 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-13 18:06:03,485 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2021-10-13 18:06:03,485 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 18:06:03,486 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 18:06:03,486 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 18:06:03,562 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-13 18:06:03,563 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 18:06:03,564 INFO L168 Benchmark]: Toolchain (without parser) took 540727.54 ms. Allocated memory was 46.1 MB in the beginning and 664.8 MB in the end (delta: 618.7 MB). Free memory was 22.5 MB in the beginning and 145.0 MB in the end (delta: -122.5 MB). Peak memory consumption was 496.4 MB. Max. memory is 16.1 GB. [2021-10-13 18:06:03,564 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 37.7 MB. Free memory was 17.2 MB in the beginning and 17.1 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 18:06:03,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.10 ms. Allocated memory is still 46.1 MB. Free memory was 22.2 MB in the beginning and 21.4 MB in the end (delta: 868.5 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-13 18:06:03,570 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.18 ms. Allocated memory is still 46.1 MB. Free memory was 21.4 MB in the beginning and 30.4 MB in the end (delta: -9.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2021-10-13 18:06:03,570 INFO L168 Benchmark]: Boogie Preprocessor took 45.33 ms. Allocated memory is still 46.1 MB. Free memory was 30.2 MB in the beginning and 28.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 18:06:03,571 INFO L168 Benchmark]: RCFGBuilder took 1453.59 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 28.3 MB in the beginning and 35.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-10-13 18:06:03,571 INFO L168 Benchmark]: TraceAbstraction took 538689.83 ms. Allocated memory was 56.6 MB in the beginning and 664.8 MB in the end (delta: 608.2 MB). Free memory was 35.1 MB in the beginning and 149.7 MB in the end (delta: -114.6 MB). Peak memory consumption was 492.5 MB. Max. memory is 16.1 GB. [2021-10-13 18:06:03,571 INFO L168 Benchmark]: Witness Printer took 96.38 ms. Allocated memory is still 664.8 MB. Free memory was 149.7 MB in the beginning and 145.0 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 18:06:03,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 37.7 MB. Free memory was 17.2 MB in the beginning and 17.1 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 355.10 ms. Allocated memory is still 46.1 MB. Free memory was 22.2 MB in the beginning and 21.4 MB in the end (delta: 868.5 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.18 ms. Allocated memory is still 46.1 MB. Free memory was 21.4 MB in the beginning and 30.4 MB in the end (delta: -9.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.33 ms. Allocated memory is still 46.1 MB. Free memory was 30.2 MB in the beginning and 28.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1453.59 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 28.3 MB in the beginning and 35.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 538689.83 ms. Allocated memory was 56.6 MB in the beginning and 664.8 MB in the end (delta: 608.2 MB). Free memory was 35.1 MB in the beginning and 149.7 MB in the end (delta: -114.6 MB). Peak memory consumption was 492.5 MB. Max. memory is 16.1 GB. * Witness Printer took 96.38 ms. Allocated memory is still 664.8 MB. Free memory was 149.7 MB in the beginning and 145.0 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12017.1ms, 229 PlacesBefore, 38 PlacesAfterwards, 241 TransitionsBefore, 35 TransitionsAfterwards, 1962 CoEnabledTransitionPairs, 7 FixpointIterations, 158 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 32 TrivialYvCompositions, 10 ConcurrentYvCompositions, 15 ChoiceCompositions, 251 TotalNumberOfCompositions, 3077 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2311, positive: 2222, positive conditional: 0, positive unconditional: 2222, negative: 89, negative conditional: 0, negative unconditional: 89, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1473, positive: 1446, positive conditional: 0, positive unconditional: 1446, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1473, positive: 1441, positive conditional: 0, positive unconditional: 1441, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 32, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 221, positive: 30, positive conditional: 0, positive unconditional: 30, negative: 192, negative conditional: 0, negative unconditional: 192, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2311, positive: 776, positive conditional: 0, positive unconditional: 776, negative: 62, negative conditional: 0, negative unconditional: 62, unknown: 1473, unknown conditional: 0, unknown unconditional: 1473] , Statistics on independence cache: Total cache size (in pairs): 119, Positive cache size: 110, Positive conditional cache size: 0, Positive unconditional cache size: 110, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - 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 - PositiveResult [Line: 150]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 257 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 538410.7ms, OverallIterations: 41, TraceHistogramMax: 4, EmptinessCheckTime: 98.0ms, AutomataDifference: 265189.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12099.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1603 SDtfs, 9992 SDslu, 22724 SDs, 0 SdLazy, 34016 SolverSat, 5301 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 95542.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2810 GetRequests, 811 SyntacticMatches, 5 SemanticMatches, 1994 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31374 ImplicationChecksByTransitivity, 224836.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=934occurred in iteration=22, InterpolantAutomatonStates: 1152, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 804.8ms AutomataMinimizationTime, 41 MinimizatonAttempts, 9705 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 898.8ms SsaConstructionTime, 7546.3ms SatisfiabilityAnalysisTime, 218351.0ms InterpolantComputationTime, 2645 NumberOfCodeBlocks, 2644 NumberOfCodeBlocksAsserted, 113 NumberOfCheckSat, 2570 ConstructedInterpolants, 118 QuantifiedInterpolants, 76930 SizeOfPredicates, 648 NumberOfNonLiveVariables, 14824 ConjunctsInSsa, 1613 ConjunctsInUnsatCore, 75 InterpolantComputations, 9 PerfectInterpolantSequences, 404/1333 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 18:06:03,798 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 18:06:03,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...